I gotta say...nothing beats the original.
Starting out as a Dark Elf Enchanter, chatting and cooperating with your fellow brethren of The Spurned at Newbie Log in Nektulos. Moving to the Orc Camps in East Commonlands (while trying to not go LD on Saturdays, when the Bazaar was held in the EC Tunnel).
Then Derv camps in North Ro. The thrill of watching the Wood Elf Druid you've been Derv-hunting with for the past week finally hit Level 14, and passing out SoW for her first time ever.
Battling over caimans and crocs in Oasis, while simultaneously trying to avoid the ever-present Spectre trains, and sobbing with relief when a kindly Lvl 45+ who was just passing through stomped into the dunes that nasty Sand Giant that helped you leave 14 corpses at the docks.
Your first boat-ride (from FP to OoT), where you accidentally fall off the boat, only have a Swimming skill of (37), spend the next 3 hours swimming to the other side...and find out you can only zone on a boat. Spending the next 2 hours using the "/loc" command to painstakingly make your way back to the Sisters dock...only to find they have no love of Dark Elves, and whom proceed to give you a quick one-way ticket back to your Bind point (which is in Neriak, of course).
Avoiding the Dwarf patrols as you make your way to Unrest for the first time, only to have Invis drop and the 4 "adventurer" NPCs camped on the shore beat you into a bloody pulp. Running back to retrieve your body, being clever enough to use "Illusion: High Elf" this time, so you don't have to worry about invis at all. Finally making it inside Unrest, and getting trained to death 5 times in the first ten minutes. Swearing you'll never set foot on Faydwer ever again.
Successfully questing your first ever Stein of Moggok. Hoarding the 3 charges of Light Healing on it. Selling it for the mind-boggling price of 200pp once you've used them up. Doing the quest again, and finding out that killing the Barbarian's dog in West Karana for the fish corpse wasn't such a good idea after all. Making a mule to kill the koalindl fish for you, camping him out in the pool because you can't step out of it without being instantly killed by the Paladin guarding the fish, and logging back to your main...only to find the koalindl corpse gone, and someone /ooc'ing "So long, and thanks for all the fish!" Logging back to your mule to kill another one, and finding out the hard way that Rodcet Nife takes it personally when you try to whack him when he's in fish form...
Passing through Lake Rathetear at night, praying your SoW doesn't drop at the (now undead) Gnolls before you hit the zone-line to South Karana, and Aviak City; the tortured indecision over whether or not to tank your faction and trade hassle-free Druid ports for the easy XP offered by the Treant camp.
Staying up 3 days straight, waiting for your spot in Drelzna's Jboots camp in Najena to open up; falling asleep when it was your time to loot, and waking up just in time to grab it before it was automatically passed to the next in line. Dancing for joy, because you just got the last Jboots ever dropped before they became a quest-only item that no sub-50 will ever see again (until twinking caught on with everyone and his brother).
Entering the Forgotten Temple of Cazic-Thule, whose alligators make the saltwater crocs of Oasis look like fluffy bunnies. Endless trains in the CY, and hiding behind the tree in the corner praying a Templar didn't spot you. Grouping in the Maze, celebrating with your friends the first time you hit Level 29 and got CLARITY...oh, and Augmentation for the melees, too! Being able to trade that Clarity for a teleport anywhere a Wizard/Druid could go; or any buff a Cleric/Druid could cast.
Hitting Level 35, and celebrating with a bottle of Jack Daniels, because never again will you have to stare at that accursed Spell Book while medding, ears straining for the sound of approaching feet/hooves/wings. (Sitting with an open Spell Book is like ringing the dinner bell for every mob in the zone, whether a Level 1 Orc Pawn or a Level 46 Ice Giant.)
Moving through Upper Guk on your way to Lower Guk, hoping you didn't cross paths with a Shaman froggie that could See Invis, because you haven't yet killed enough of the Undead ones to become non-KoS with the Live froggies. Getting into a Lord camp at Lvl 36, because you're the only Enchanter in the zone; having your group wipe, and finding out the Cleric forgot to Bind herself nearby, and will be running back from Kaladim. Hands shaking the first time you were in an Archmage camp, and an SMR dropped; crying when you saw it go to yet another melee...so you trade him the SSoY you got from the Ghoul Lord group, which is what made him roll against you on that SMR in the first place. Learning a valuable lesson about how being greedy might benefit you in the short-term, but is harmful to you in the long-term, in the process.
Making Level 46, and venturing into PoFear for the first time, nervous as a long-tailed cat in a room full of rocking chairs, praying the raid wouldn't end with you being Level 45, and your corpse (and equipment!) rotting in a Plane you can no longer get into. Later on, having a few more raids (and levels) under your belt, you see a God take a personal interest in you for the first time ever...
Cazic Thule shouts, 'JUDICUS'
LOADING, PLEASE WAIT...
The opening of the Plane of Hate, and the feeling you are NOT welcome in a claustrophobic, high-fantasy version of "urban decay". Getting your first piece of Insidious armor (Halo). Discovering, to your unending horror, that Golems are completely immune to every kind of magic at your disposal. Watching the God who spawned your race, and whom you spurned, die by your hand...then trying to go through Kithicor Forest at night, and having the favor returned by half a hundred of his undead abominations, who all dog-pile you at the same time, as though you'd tied sausages onto your belt and tried running through a kennel of rabid dobermans.
Last, but by no means least...kicking back on a deserted island in the Ocean of Tears, chatting with a friend as you watch the sun set and the moon rise. Moonrise in OoT was always quite spectacular (almost as much so in North Ro), and always worth taking time to go see. Breaking out the fishing pole, and spilling your beer and losing your bait at the same time. Having a full Friends list, and an empty Ignore list.
Those are the memories I carry from the EverQuest I started playing in 1999. It's changed almost beyond recognition, since. I don't know what's missing, to tell you the truth. Maybe it's the fact that most of the role-players have fled, leaving us with just the power-gamers (who have the "numbers" mentality). Maybe it's the fact that you can't really get anywhere anymore with just 1 account and 1 toon; or that the numbers of people who play continue to decline, and SOE seems blind to the fact that "word of mouth" isn't cutting it as their sole advertising strategy. Could be it's just an ephemeral "something" that EQ had, because it was new and different, and everybody was learning everything at the same time, so you had the sense you were on a grand adventure in an unknown world.
All I know is that EQ has lost "it", whatever "it" was; and I don't know if "it" will ever come back. But I keep hoping. And playing. I'm a one-MMORPG kinda guy, and I'll play EQ until either I die, or the servers go down for the last time. And when that happens, I'll never play another one again. Because EQ was "it" for me; and once you've had a taste of the real thing, everything else is just "World of Warcraft".