Well i prefer the Wii, but i haven't used either the PS3 or the 360, but i know that I'm usually better at Wii-style games, whereas, with the other buttons-only consoles, I'm pretty hopeless (I'm just no good at pushing buttons to move a car/character).

Another reason why i like the Wii is that it can do things more realistically, e.g.: You can toss a pancake out of a frying pan by doing the same motion that you would in real life, but on other consoles, all that you can do is mash a button--not very realistic.