2k: never used, but i think xp is a better version of this
2k3: okay, i like the battle system and such, even though i never really learned how to make good 2k3 sprites so i never really got into it
xp: the best for many reasons in my person al opinion. for me, mainly its because the characters can be whatever size you want them to be. Also, I like the graphips alot more. the default battle system i DONT like, but thats just because i cant make custom battlers 'anime style'. as a remedy to the aforementioned problem, xp has scripting!(cheers)so, in addition to being able to fix the BS...lol bs... you can do tons of other cool stuff! ...xp...