I carry a fairly full bag, not as full as blakes ideal bag above, but I carry an Innova deluxe...
1 z pred
4 avengers (1 z 3 X)
4 DX teebirds
3 wasps (1 Z 2 D probably will be 4 in a couple months once I have one that will flip up and turn)
I cannot believe how much better my game is throwing discs in different stages of wear instead of different molds. Not only you learn a disc better than ever throwing it until it breaks in, but the changes in form are more similar from line to line.