I currently have a 360, it is tons of fun, but recently I've been falling back on Xbox 1 games. That's besides the point, in the near future I plan on getting a Wii. My visitation of the Wii forums has risen, as well as my viewings of System Wars.
It seems to me, from my observations, that the sheep crowd is much more kind and forgiving than Lemmings or Cows. Sure, I have a few friends on Xbox Live that are in the mature gamers region, and by that I mean people who actually are allowed to play M games according to ESRB guidelines. I'm willing to bet a lot of these guys have Wiis. Sheep are extremely mature, unlike the lemmings on the 360 board, and the cows on the System Wars board.
I don't really plan on buying any Sony products, so I might be a little biased against cows, but I don't think I am. The Playstation 3 is a wonderful machine, but it is not really geared towards the same crowd as the Wii. The PS3 is going for the 'edgy,' 'rebellious' crowd, whom believe themselves to be mature. On the other hand, the Wii is going for the people that Nintendo fans all along, the true mature gamers.