Haven't seen this topic before but I like it and was wondering about the same thing.
I'm a female but I never play families. Dynasty is my first and probably last multigenerational game in Sims, if I don't find some other challenge that include families. I was so disappointed with vanilla Sims that I uninstall it week after getting it! It was too boring, after I collected everything, perfected garden and aquarium and wrote and paint and wrote and paint etc. Only thing I loved about it was building. WA brought me back and since then, I always create one character, adventurous by template. My favorite game of all times would be GTASA (and I hate GTA IV for being so gray) and Diablo II. I'm very very surprised to see so many fans of this game, since I never met anyone liking it! All my friends find it boring, with poor graphic, to repeatable etc. Honestly, I never expected to see any fan of this game, not to mention this many!
Back on topic, I'm married with a child for a few years now, but that didn't change my game style, I put my son to sleep by driving in GTA and listening in a car radio (or by watching intro to SidMayer CivIV). In real life I lived alone almost a decade, and love it, and also am adventurous by nature too, so I guess I play myself in Sims. That's why I probably never marry and have children, since I have that in RL and love what I have.