I play video games with my sons (their ages are 4,6, and 19) as a way to bond (and it's fun). We don't play very much (and none of them spend much time playing video games without me either). I'm 41 years old. We typically play either sports or racing games. I don't encourage the violent games (i would hope for obvious reasons), and we do discuss why.
I am a huge gamer and love to play games of all sorts. My PC games have not been getting played as much as my Xbox 360, Playstation 3 and Wii. After a long day at work in front of a computer I do not really want to come home and play games on the PC, so most gaming happens on the TV anymore. my favorite game right now is Final Fantasy Tactics A2 on the Nintendo DS.
I like playing FPS on my computer and I liked the most is COD4 but for Online FPS, I play America's Army.
One of the best games ever made in my opinion was the Fallout series. Fallout 1 and 2 are excellent games that every true gamer should play at least once.