darkSpyro

Luigi's Mansion 2, Paper Mario: Sticker Star, Pokemon Mystery Dungeon: Gates to Infinity, Fire Emblem: Awakening, The Legend of Zelda: Ocarina of Time 3D or Kid Icarus: Uprising?

Kid Icarus; don't worry about Sticker Star

If you're a European 3DS user, may be worth looking at the "Too Many Games" promotion, if you have a Club Nintendo account... Work towards getting three of the games in the offer, then getting a fourth for free. xD


Elsewise, what I'd say is... Skip Sticker Star, unless it's really cheap.

As for the others?

Luigi's Mansion 2 - Got this, quite like it. Somewhat fun in multiplayer (only played local, though)
Pokemon Mystery Dungeon: Gates to Infinity - Not played the actual game yet(not out yet over here). Played the demo, though, and rather enjoyed it. Got it preordered.
Fire Emblem: Awakening - Got on way, played demo and quite liked it too!
The Legend of Zelda: Ocarina of Time 3D - Don't think this is worth getting unless you haven't played it during any of the re-releases (or original release)
Kid Icarus: Uprising - Really liked this one! But, now want all the AR cards, and a binder, but nowhere seems to sell them anymore... :/

So, maybe try out the demos for ones which have demos...

I just recently beat the main story of Luigi's Mansion 2. Best game I've played on the 3DS. And it's a really unique game. Really tests your wits.

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Fire Emblem awakening. I'm usually not a fan of tactical RPGs but I couldn't put it down.

Zelda and Mario

Kid Icarus: Uprising is really good