Don't scare yourselves too bad, roosters can be OK. I haven't had enough yet to have good statistics, but out of 8 so far, 3 have been total sweethearts and only one really earned his place in the stew pot. That one was getting sneaky and pinching my daughter hard from behind. Let's just say he didn't get any farther in his aggression career.
These were all large stock. Sweethearts were an Australorp, Black Copper Marans and a White Rock/RIR mutt. George the butt pincher was a Cuckoo Marans. Docile but not particularly affectionate to humans were 3 Easter Eggers and another Cuckoo Marans, though one of the EEs did learn how to play and relate to our dog.
My worst injury was from a BCM hen that nailed my eye (from behind my glasses!) while perched on my shoulder - bloody mess in the sclera (?) that took weeks to heal. I yelped and tossed her and she seems less "pushy" now.