My current collection, and recommendations from them (minus the stuff you've played already):
Consider a 5 as average, 6 as good, and a 4 as at least buyable. Anything 7 or above is exceptional and a 9 induces orgasms; a 10 would kill you from being too good.
Advance Wars Dual Strike: Turn based strategy, good characters, very well executed. This game made me get a DS. 8.5/10
Advance Wars Days of Ruin: More of the same 7.5/10
Castlevania Dawn of Sorrow: Classic castlevania: direct sequel to Aria of Sorrow 8/10
Castlevania Portrait of Ruin: Original story, decent combat and such; it's a good game 7/10
Elite Beat Agents: A fantastic music game, and with good difficulty for hardcore players 7/10
FFXII: I liked this one more than the original FFXII actually; great characters and good control system. You aren't inundated with political intrigue; instead the focus is on Vann and Penelo doing their sky pirate business 8/10
Front Mission: Remake of the original front mission! A very technical SRPG 4.5/10
Luminous Arc: Typical japanese SRPG, good for fans of the genre; it plays exactly like FF tactics, but the story is pretty cliche' 5.5/10
Lunar Knights: Action RPG, made by Hideo ******* Kojima, and he lives up to his reputation. Good boss fights, good levels, nice elemental attribute system, and a decent story make this one of the better choices on the DS 7.5/10
Metroid Prime: A good fps and one of the most graphically impressive DS games, but you don't like them
Ninja Gaiden Dragon Sword: A FANTASTIC rendering of the Ninja Gaiden feel; what's more is that it's not as hard as the first Ninja Gaiden, but it is as hard on hard mode, meaning that casual players don't have to kill themselves, and there is challenge enough for hardcore players; is a bit short, bringing down the score slightly 8/10
Phoenix 1
Phoenix 2
Phoenix 3 These are basically interactive novels. The humor is fantastic and the cases themselves are extremely emotional and satisfying. However, there are many small technical ******* (like not being able to speed up dialogue, EVER. If you die have fun reading through the entire agonizingly slow case again) and these games can be very frustrating if you see the right logical connection, but simply do not know how to present the evidence. These are totally hit or miss; I can't score them.
Pokemon: The best handheld rpg ever 9/10
Puzzle Quest: It's a puzzle game in a fantasy world. occasionally frustrating but mostly enjoyable 6.5/10
***
Crystal Chronicles is a dungeon crawling hack and slash type. I'd go with Lunar Knights instead, or Castlevania. CC is okay, but there is better stuff out right now.
Final Fantasy IV comes out in a month or so, and they've basically Playstationafied it. It will be nice.
Disgaea gets remade on the DS pretty soon. If you haven't played Hour or Afternoon of Darkness, get it. Hour of Darkness is the best SRPG that I have
ever played 10/10.
Word Ends With You is good, especially if you like rpgs.
Tactics Advance 2 comes out soon also. It's going to be spectacular I think.
New Castlevania Soon