Classes and SkillsFollow

Ok, I have a little problem that I'm debating whether or not to fix...

First of all, I have three characters that I use often
Undead Mage (Mining 90+, Engineering 110+)
Tauren Warrior (Skinning 160+, Leatherworking 115+)
Troll Hunter (Skinning 20+, Tailoring 85+)

These are all below level 20, so major changes won't impact me too much
I've been playing for less than a month, and when I created these, I pretty much had no idea what I was doing. My problem is that none of the trade skills fit the class very well. I can either rotate all the skills (tailoring to mage, LW to hunter, etc) and have the trade skills better suited to the class, or I can leave it as is and not lose any of the work I've done so far.

I'm open to any ideas, so any kind of help would be appreciated.

So Engineering mages are fun, so leave him as is
Warrior.... send your existing leather to your hunter, drop both, take up someing handy, leatherworking and tailoring are the 2 least usefull skills to a warrior, warrior alchemst are good IMHO, and alchemy is eazy to level, eazy to use, and reqires little work to farm, smithing is a goodin for a warrior, but you will almost always find better stuff in instances, or go Nuts-O and take someing like enchanting and keep skinning, that way you can sell enchanting mats with the disenchant skill, and sell you skinns or give them to your hunter.

Hunter, take up LW ,or mining and become a gatherer.