I can't honestly say that I hate too many game systems. I hate Fuzion, which is ironic because I like all of the games that it was created from piecemeal. For me, it seemed like it took all the bad barts of those other systems, dropped the good parts, and tried to mold them into something playable. On top of that. . .
Support has always been spotty (at best) and I can't think of too many Fuzion products that can genuinely be considered popular, with the possible exception of Artesia (which is currently on hiatus insofar as support is concerned). Most planned Fuzion product lines died after the first book or two, so I don't think I'm alone here.