We have a Wii, 2 xbox 360's (one with Kinect, and one without), a PS3, a PSP, and a Nintendo DS. We love them all, and all for different reasons. They all have different games and different types of play. We take the PSP when we travel and we watch movies on it. Also my DH plays games on it when we travel. I take the DS on trips for myself so I can play games.
We use the PS3 a lot for home media. It is like our home media hub. We watch lots of movies on it, Blue Ray as well as non Blue Ray. DH also likes to play certain games on the PS3 because he thinks the graphic are better.
We like to play things
together mostly on the xbox. I am a slow learner when it comes to controllers and the xbox was easier for me to pick up than the PS3 and there are a good handful of Xbox 360 games that we have fun playing together. I also have a couple of just "me" games that I like to play on the Xbox 360.
As for the Wii, we have some racing games, some cooking challenge games, big brain academy, mario party games, and exercise type games. We had a lot of fun with that when we first got it. Now it is up in our home gym to be used for Yoga, but sooooon I will dust it off and get to play Epic Mickey on it when it is released! I am so excited for that!
We just got the Kinect today and so far it is a lot of fun! We used it for a couple of hours this morning and we're both already sore. DH is having a lot of fun with the Thai Chi portion of the exercise game that we bought to go with it. It was very funny watching him strike those poses.
All the systems have their pros and cons, but we enjoy them all!