37, married, 2 kids - 4 and 1.
I tend to play quieter games; gunshots wake the little ones so almost no FPSs. I also had to put away Demon's Souls as the no save made it unplayable. In MMOs, I avoid raids/dungeons as I don't want to leave them hanging if one of the kids has a bad dream, throws up, etc. I'm assuming that will change as they get older. But for right now, almost all of my gaming is from 8pm - midnight, once they are down, but before I go to bed.
My wife games as well, though only a few crossover games with me. GW2 is main one we play together. The biggest change for us is that we recently moved away from old friends, so have switched from funner party/social/fighting games (MarioKart, Smash Bros, Soul Caliber, etc.) to either stuff we play online or solo/paired games.
My eldest kid is not really into games. I try to interest her occasionally, but she'd rather be coloring, looking at books, going to the park, or watching shows, so we do that most times. My youngest is way into controllers, and electronic toys, so I'm guessing she will be more into gaming, but will need to wait for her manual dexterity to catch up with her interest to try.
Overall, I play a lot less, nothing M when the kids are up. I also find myself watching a LOT less tv. Maybe 3-4 shows on Hulu, and even then, I'm as likely to have them as background noise as I am to curl up on the couch with my wife to watch them.