These are the Rpgs I've enjoyed regardless of any bugs or problems they may have.
Oblivion- I often feel like this game was made specifically for me, it has everything I love: fantasy, open world exploration, tons of swords and magic spells, decision making, and obviously tons of quests.
Borderlands- this game is just a ton of fun, levelling up is fun, collecting guns is fun, boss fights are fun.
Soma Bringer- Diablo with animmu characters, pretty cool story, different but interesting graphics for a DS game.
Dragon Quest V- one word, EPIC!!
Star Ocean The Last Hope- fun gameplay and battles, story is meh but I had fun with it which is what I care about.