How old are these boys? "Really friendly and sweet" can become "Wants to hurt me!" if you are misinterpreting the behaviors your are seeing in younger cockrels. I want my cockrels to respect my space at all times instead. Mary
I agree w [@]Folly's place . Depending on how old your roos are, you may be in for a big surprise later on temperament wise. If they are very young, I would wait a little while longer to decide which ones to give away. I would also separate these roosters from the hens, as those girls may become seriously hurt.
Best of luck with your decision. Let us know how it turned out.