Honestly you can just pick a random game out of the entire library and probably get a fantastic RPG. Same goes with the PSP, best handheld generation ever.
Yea I mostly focused on console RPG's this gen, and kind of fell out of the RPG craze, but Lost Odyssey and Pokemon Black brought me back. I have quite a bit of RPG's to beat for the DS and PSP before I can say I beat everything I like. I count 13 DS games left to do (plus any others I buy) and 14 for PSP (but I have every game I want now).
That's why I made this thread, to complete my DS collection, and then work on my games. DS games now are becoming harder and harder to find, and an older DS game is pretty cheap nowdays.