I was in a pistol shooting league for about a year and a half at a local range, it was a lot of fun, but you come to some realizations when you do something like that.
1) You're not as good as you thought you were
(I definitely became humbled lol)
2) There are some people who are phenomenal and will make you envious and will cause you to become rattled if they go before your and you realize what you're trying to compete with
3) It shatters the myth that all LEOs are experts with side arms (with all due respect, there were 3 police officers in my league, 1 was decent, the other 2 were always near the bottom of the pack)
4) You realize just how expensive of a hobby it is lol (I was going through about $100/week in ammo)
Granted, what I was in wasn't an official sanctioned league, it was just a Monday night recreational league, but there were still some top notch shooters there. It was a 3-pistol league (rimfire, centerfire, 45)...however, most people there just used their 45 for both the centerfire and 45 portions.