I dont know what games you have, but these are the games I have:
Professor Layton and the Miracle Mask: 3D is really nice, some of the puzzles are good (though some are bad). The cutscenes and story, and visuals and voice acting are all great and very charming. I recommend this if you want a time waster.
Kingdom Hearts 3D: It's been a while since I played this game, but it's pretty fast paced action. I'm not a fan of the freeflow battle system or whatever it's called, but it's not a side game like Days was. It's a full KH game with some new worlds. Pretty fun.
Mario Kart 7: Nuff said.
Star Fox 64 3D: Fun arcade shooter. You'll probably get some enjoyment out of it.
Mario 3D Land: Nuff said.
Virtues Lsat Reward: This is a visual novel similar to 999. If you don't like lots of reading then this game isn't for you. It's not as creepy as 999 and not as shocking and twisted as 999 was, but the story is a huge mind fuck of a twist at the end.
Tales of the Abyss: Honestly I have trouble getting into this game. Maybe because it's on a small screen, or I just hate the characters and voice acting, and I think everything looks a bit dating. But for a solid RPG with hours, you might like it.
Ocarina of Time: Yeah, you know what this is. Currently going through a playthrough again with only using 3 hearts.
Theaterhythm: Rhythm based game, gets pretty repetitive and extra songs cost like a dollar each which is bullshit.
On 3DSware:
Sakura Samurai might give you some fun. Look up videos because it's hard to explain. Mutant Mudds is also pretty fun. 3D effect is great in this game.