I started modeling for 'cosplay' purposes; i.e. dressing up in the costumes of specific characters and posing as they would. It's a little like modeling, acting and costume construction all at once. It's a bit addicting, as anyone here can tell you.
While doing such a hobby, I've met a few photographers, and I discovered I really liked being in front of the camera as myself, too. It's a great hobby, and I can meet great people. I really want to act, but I certainly wouldn't mind modeling as a career either. Unfortunately I'm hardly the only one.