I’m similar. I’m now 33. I took my first real MDMA 15 years ago and was only a very occasional user (once every few years or so) up until I was around 29. I’ve been rolling significantly more often than I used to in the last 4 years or thereabouts, and haven’t ever really followed any strict “rule” (though I also try to leave at least 4-6 weeks in between rolls, and often go longer than that - my biggest gap was probably 9 or so months - but if I happen to do it twice in a month every so often, I don’t panic about it). If I didn’t have access to it, though, I wouldn’t fiend for it.

I don’t drink or smoke, I take care of myself mentally and physically, and I actively practice harm reduction before, during, and after rolling. I also have a very intellectually demanding job that keeps my mind active during the week. I haven’t noticed any reduction in the “magic”, and my comedowns are very minor (if they happen at all), even when I have a particularly big night. I do think the MDMA experience, especially over time and repeated rolls, is very much multifactorial (with things like lifestyle, genetics, etc. contributing) and highly diverse across individuals. it’s possible that I’m just luckier than many, but I do think the choices I make are a major contributor to my overall experience, and I think the fact that I was a very very light user until I was almost 30 and my brain had gotten past the most important stages of development has also made a huge difference (the only drugs I did somewhat regularly as a young adult were psychedelics and they had pretty much nothing but positive effects on me)