All points made. I'm close to 37 and always compete in adult and occasionally also the masters in local comps, but I live a clean life and have a lot of time to train. I'm also always competitive in the adult divisions. I think masters and seniors are reserved for when you actually get older older, like 40's and also for the guys that only have a limited amount of time to train. I'd also say it's maybe good for when you get up to a higher level in the browns and blacks. Funny enough, I've had quite a few tough matches in the masters divisions in some local/regional tournaments and an easier time occasionally in the adult. Just depends.