Oh, my, yes!
Modern Warfare 2 isn't really my cup of tea, but Civ 5 has been a major addiction of mine (I'm trying to cut back because sitting in front of my computer isn't really considered an active lifestyle, even if I am preparing to declare war on Montezuma).
I used to play World of Warcraft regularly, but sort of drifted away from it; I still enjoy the game in theory, but in practice I just never seem to have time these days to play much. Again, sitting on my duff killing Arthas isn't conducive to a healthy lifestyle, so it isn't a great loss.
My husband just finished Fallout: New Vegas, and though I didn't play, I enjoyed watching him. Only trouble is that I now have "I've Got Spurs That Jingle-Jangle-Jingle" and "Johnny Guitar" stuck in my head and I fear it may be permanent!