I guess I'm competitive by nature....but don't read that the wrong way. If I were shooting by myself (which I did for years), I'm still trying to shoot tighter groups or shoot more quickly or hit more shots from a farther distance. I'm competing with myself.
I started shooting SASS last December. My first stages were in the 60's. Then, as I got the hang of it, I started to shoot in the 40's. Now, I typically shoot in the high 20's to mid 30's. I practice (a lot of dry fire) to get better -- but that's not to be "World Champion" or anything. It's my personal satisfaction.
I've played guitar since I was 6 years old. I played in bands in HS, college and 8-10 years ago, I played in a fairly good bluegrass group. We played local festivals and restaurants. Alas, the group broke up and now, I hardly ever pull the guitar out to play. Why? Unless I have some goal (like learning a new song for the group or something), there's no motivation to get better. I guess it's my "flawed" personality, but I need a goal or something out there that I want to achieve before I can get motivated to do the practice to get better.
If I were a fisherman, I'd be trying to cast better. If I were a golfer (which I once was), I'd be trying to hit 'em better. If I were a team roper, I'd be trying to rope better. If I were a cake baker, I'd be trying to decorate better cakes. It's not the destination; however, it's the journey that makes it fun.