I was introduced to handguns via semi-autos. Specifically, the M9 (in the Corps) and the 1911 (first handgun I bought). I bought a myriad of semi's since then.
Now, I still have more semi's than revolvers. I would have to call myself a revolver man, though. If I knew I was going to be in a shoot-out with several folks, of course a semi would make more sense. Just all-around SD, hunting, woods, around the house, all around gun? Revolver hands down. I can carry a .357 snubbie, pack it with .38+P, and rock on down the road prepared for most anything. I always have the option of changing ammo for different situations. Which leads me to the real reason why I have become a revolver guy... they are just more versatile. Yeah, you can't fire 15 rounds without reloading and the reload is slower... but that's the only trick the semi has on the revolver.
Basically put: If I'm going to war or if I'm on duty, give me a semi. Every other time? I'll take a revolver.