I'm an avid photographer. I've been known to go to great lengths (traveling across the world, hiking up mountains and glaciers, scuba diving through freezing water and caverns, etc.) try to get the perfect shot. Whether I get that shot or not is a completely different story. If anything, I got to do something awesome along the way; sometimes the story is better than the picture anyway.
It really doesn't sound like it, but I'm definitely not an "always on" adrenaline junkie. I'm just a low-key guy that will try anything from folk dancing to ice climbing at least twice. If I really like any of the things I've tried, I'll stick with it.