Took me a lot of experimenting to realize that you all the molds are pretty good so just stick with what work for me - the core is always aviar/roc/teebird/destroyer- with 2 or 3 other speciality molds to keep it fun and have some versatility in terms of getting out of trouble or crazy wind days.
That said, I think people make too much out of how hard it is to learn new plastic. I throw all Innova pretty much, but if they went out of business tonight - I'd be shooting the same score with a mixed bag of within a week or two( though I'd miss my beat Rocs
). Professionals switch for sponsorship purposes all the time and stay on top of their game. And I suspect most am's could as well. The only part of my bag I even bother messing around with is approach/upshot discs. Its the only "slot" that has a huge variety of discs that is any fun to experiment with. From something super overstable to throw grenades or spike hyzers in the wind, to the floaty Rattler that's completely the opposite but just as fun to throw.
I feel like it just doesn't take a crazy amount of reps with a disc to figure out its characteristics, that's kind of what makes trying new discs fun.