Of course it's a good investment.
There are tons of games and I have like 10 more games to finish..
The problem are that games are sometimes a bit pricy and the 2nd hand value if you wanna sell them back are a bit low.

You should get MH3U on 3DS it's a great game. Keep in mind that you can online local play and not play multiplayer.. Don't be like me got a Wii U just to play MH3U online lol!

All games are really good.
My personal favourite is Fire Emblem Awakening, MH3U, Luigi's Mansion and Zelda Ocarina of Time.
Not one game on the 3DS is not worth the play IMO. Out of all the 10 games that I have, I am quite satisfied with eveyr single one of them.
Just don't get those animation movie games, and kids game (though some are still fun)

Take note about what version of 3DS you are getting as well since it's region lock. JP 3DS or US 3DS or Asia.

This post has been edited by Rei7: Apr 23 2013, 11:36 AM