Being someone who owned both of these handhelds, I must say I played 3DS more than my vita. Games on Vita doesn't seemed to have much replay value, we'll I'm speaking for myself. Played Uncharted, Gravity Rush, FFX, FFX-2, Disgaea, Zeros Escape and that's all. I did enjoy those games but it only lasted until I beat them. I'm not very excited about the upcoming game roster either for Vita either. 3DS, on the other hand, simply has so many great titles spanning across all genres. I'm not gonna list out those titles here as I think you might justify on that by visiting GameFaqs or YouTube.

Of course, if you like to collect achievements then Vita is the only choice. I'm not sure why buy Nintendo doesn't seemed to fancy it. I reckon that it too for I think it might ruined the purpose of gaming, to have FUN rather than hunting and checking out those faqs. Honestly I'm used to hunt those trophies on PSN but as I have less time to game now, I somehow glad that I'm not on poison anymore.