Virtually no regrets over my years of hobbying....nor my expenditures as a result.
Honestly, I find it rather humorous when I listen to some of my younger colleagues' complaints about their humdrum sex lives with their wives, gfs, etc. Here they are, young men with resources, who, for various reasons, settle for the most boring sex lives you can possibly imagine.
No, instead, I'm thankful that I have been blessed with some abilities & resources that have permitted me to explore a myriad of sexual options..... In short, hobbying (for me, anyway) has been an amazing adventure, So, regrets? Sure, I have some....as we all do in the various arenas of our lives.
However, I'd do it all over again.....just wish I had more money, lol!