1. Professional golfer
Aside from the obvious benefits of being a golfer on the PGA Tour, I want to be a pro golfer so I can high five every kid who lines up in between holes. If you've ever been to a golf tournament, or even watched one on TV, you've seen a bunch of kids lined up as the golfers make their way from one green to the next tee box. Most golfers high five a couple of them or even toss a ball every once in a while, but they don't look like they're having a ton of fun with it (aside from maybe Matt Kuchar). I would be known as the guy who interacts with all the fans on the course and wins 25 majors.
2. MLB pitcher
I get so mad whenever I'm watching baseball and the pitcher gets a new ball every time one ball scuffs even two of its seams on the dirt behind home plate. I want to be a professional pitcher for the sole purpose of using the same ball until it goes out of play. There's no way a tiny bit of dirt has that big of an effect on the pitch. I have pitched a ton of innings in rec baseball throughout my life, which is not far off from the major leagues, and I have never had a problem throwing a slightly dirty baseball.
3. Professional soccer player
I've talked about this before, but I hate how much soccer players flop. I want to go pro in soccer so I can be the only player in the world who never flops. Hopefully, I can be good enough that people follow my lead and stop flopping in general.
4. Chipotle worker
Moving on from sports, the one thing that bothers me most about Chipotle are workers who don't give you big enough portions. The amount of chicken you toss into my burrito bowl has no effect on your wage, so why are you only giving me half a scoop? If I worked there, I would give massive portions because no one likes having a tortilla with too much room at the end.
If I can find a way to become a multi-sport professional athlete while maintaining a part-time job at Chipotle, I can guarantee that I will improve all of the industries listed.