Systems always distinguish themselves by the games that they have exclusive to them.
I have a Vita because it is awesome hardware and had Uncharted Golden Abyss and a few other titles at/near launch. The summer has been slow, and up ahead it looks like a few games of interest such as AC3-Liberation.
I don't need a new game for Vita every week/month... just as long as I get a few quality titles each year. I have the same expectation for my 3DS hardware aside from the couple of titles per year that interest me, mainly gets played by my wife-or-kids for the things unique to it. Most recently the excellent New Art Academy and the overpriced but still worth it Crossword Plus.
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Rest of my gaming takes place between PC, X360, PS3, and Wii... and Wii U will join that fray soon. Most of that being on PS3 because it just has more releases that appeal to my taste than anything else and I favor it for the 3rd party multi-platform titles.
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Oh I also play an occasional curiosity of a game on iOS or Android. I don't care where a good game hides... if I find out about it I will give it a shot.
