I do agree the crowds has changed and the new shooters has a different mind set. I don't even shoot our local club USPSA matches anymore. I can't stand the arrogance that I see now days. I hope and don't think we were ever that way. Even the top shooters, like Todd, Robbie, Jerry and Dougie were approachable. Have hung out with them at matches many times.
I do miss the old days, but I don't miss the matches, traveling, motels, etc. I do miss the shooters. Paul and I travelled many miles together and had a ball doing it. Ask Paul about Panama sometime. My big Three Gun was Kyle Lamb's great International Tactical Match back in the day. Being squadded with the late Mike Voigt, Benny Cooley, Jimmy Clark Jr, Frank Garcia, and John Paul of JP. Man those guys could shoot, but we all had a great time, joking and pranking each other.
Sorry, got rambling. The OP can shoot any and all the matches and have a great time. One pistol, with at least 4 mags, holster, belt and mag pouches, eyes and ears and shoot all of the disciplines. If you enjoy it like we all did back in the day, be forewarned. You will be spending money as you progress in your skill levels. Best advise, pick a pistol you like and try and ware it out with all of the ammo you can shoot.
shoot4Fun, if we could have the millions of rounds back, multiple funds spent on the newest, greatest gadgets, entry fee's and travel we could pay for a new home, maybe two. But I would not trade it all for the great friends and memories from the past.
Great times in the shooting sports for sure.