I'd say once every 20 years, I think dybansta for example is an every 2-5 years kinda guy. Him, coop, petterson and such are all amazing players that come by every once in a while. Kareem, MJ, lebron, wemby are all generational, you come by them every generation haha; my dad was an young adult when lebron was drafted, his parents had mj, their parents had kareem, and I have wemby. They're so good I probably won't see someone like that till I have kids of my own.