Oh if you are trying to get a poll between the three, won't it not be better to ask for a comparison rather than a poll? The most owned set may not be the best.
In my view:
PS3 - too little games and no friendly games.
Xbox - games geared towards hardcore or expert gamers.
Wii - games geared towards kids, family friendly games, or games which you can pick up and play without reading walkthroughs or the like.
well Xbox games tend to get ported over to PC after a few months as its owned by Microsoft so personally I would advise on either the Wii or Ps3
Wii has got decent games but they're mostly targeted at people looking for interaction with their friends or in other words its a good console to have at parties. Some good pc indie games have since been ported over to the Wii and its gathering quite a good response.
PS3 on the other hand has quite a good variety of games although I'm not too sure what type but I believe GOW III is coming out soon seeing as the trailers are already out.
I myself am planning to get PS3 soon so that I can play GOW III.
Just my humble opinions.