I've thrown mixed bags as well as just one company, and from my experience, throwing stuff from just one company seems to work for me better than throwing a mixed bag. I think that it has quite a bit to do with the similarities between balls of one line. For instance, right now, I'm throwing nothing but Track equipment. Freak, Mutant, Threat, and EMB (soon to be replaced my Phenom). The balls themselves seem to have a really good coverage on all patterns that I may face, and I already know pretty much what to expect from the brand of the equipment. Moreover, I'm trying to keep my purchases down to 1 line of product, simply because it's easier to set up an arsenal. Granted, Track doesn't specifically make desert condition type equipment, however with drilling variations and cover tweeking, I typically can find the right ball for those conditions. I guess that it's just a comfort thing for me when I go to buy a ball, I know what I'm getting from past experience.