That's pretty cool that you're still playing at 55, Argos. I imagine many of us (I'm 33, and assume many who play Diablo are pretty close to my age) will be playing still at that age, but I don't know many people your age who still play video games. What system did you start with?
As for me, I hail from the magical land of booze and strippers, aka; Portland, Oregon. Fortunately I grew up in a small town on the coast, so I'm not a hipster douchebag, nor a hippie; I just live amongst them in this city. I like building computers, lifting weights, drinking at all our breweries, the good shows on cable, and playing video games.
I started playing video games on our Atari when I was a kid, played the hell out of my Nintendo; to a point where we had to bang on it and blow in it to get it to work sometimes (pretty sure people remember this). I also busted the barrel off the light zapper when "Gumshoe" pissed me off one too many times, so we had to literally hold it against the screen for it to register (Ah, good times).
I'd probably have to say that my favorite games are those that keep me playing the longest, so those would be the Fallout series, Elder Scrolls, Mass Effect, and Diablo.