I've been doing this as well, since I was a young kid. Me and my buddy are trying to accomplish College, MLB, NFL, NHL (only be to a lightning game) and NBA (don't like basketball but will still catch a game for cheap). This year was huge for me went to TAMU, VT and Clemson this year, also caught an Astros game while in town for the TAMU game. I was supposed to go to an guardians game as well but it got rained out. I'm heading to Biloxi after Christmas and will drive over to new Orleans and catch a pelicans game, tickets are only $18. So 5 stadiums in a year also. He is my list.
NFL- Miami, Tampa ray Jay and old sombrero, cowboys at&t, foxboro, falcons new stadium, solider field,
MLB- Wrigley, Fenway, new yankee stadium, PNC and three rivers, minute maid, Tropicana, marlins, rangers Arlington park, braves original turner field, turner field where gsu now plays and truist stadium,
NBA - magic, heat
NHL - lightning
Ncaa- canes OB and hard rock, fau, ucf, usf, fsu, Ohio State, Nebraska, tcu, TAMU, Clemson, VT, Notre Dame,
Still a long ways to go, now that my son is old enough hes tagging along as well. Awesome memories being made. Gonna slow down a little next as we have a new born coming in may, so I might only get 1 or 2 in next year.
Good luck to you on your journey as well.