I count myself very lucky in the "Rooster Department." Mine have nearly always gotten along. It helps that they're Nankin bantams, a very docile breed to begin with, so I've had that advantage. I also only hatch every other year or so, so I'm rarely overrun with cockerels. When I do get more than a handful, I keep a bachelor group.
I've noticed that "The Boys" generally get along better when their ages are spread out. My best (& longest lasting) bachelor flock housed nine males, ranging from six months to six years old, with only three (the youngest) the same age. I've since lost a few of the older boys, shared some breeding stock with 4Hers just starting out, rehomed one spoiled pet and lost one to a fox. The remaining two are now my flockmaster and his "lieutenant."
Despite the lack of eggs, bachelor flocks are, by far, my favorites. I truly miss the antics and eye candy of The Frat-Boys. I thought I was "done," but I'm thinking about one more hatch, this Spring.
Please, somebody, STOP ME!