I've had mine for a couple of months but I feel underwhelmed. The only games I found appealing were Luigi's Dark Moon and Pokemon X. Everything else isn't for me. I love JRPG's but everytime one comes out for it, it has something specific that I dislike about it.
Only game I'm interested in right now is One Piece Romance Dawn, and that's only because I'm a big fan of One Piece and feel I need to support the games anyway I can.
Speaking of the handheld itself, the only thing I dislike is the analog stick or whatever it's called. It's very uncomfortable after extended periods of play. Also the XL's top screen is very wobbly. After that, I like everything else about the handhelds design.
I have an 3DSXL btw.