Nah I was thinking before buying Wii 'will i regret it' but thankfully all the game i own are awesome, not to mention cool VC stuff. And there are a lot of cool titles coming out soon/have just been released.
360 and PS3 have equal brilliance imo, but 360 price is much better now.
If I was to incorporate all consoles into one, I'd take the Wii controls, the PS3/360 graphics, the 360 Online and the Wii/Ps3 downloadness. (dont care much for arcade.)
Plus every game of course.