It can depend on age; how old are they currently? I found that mine didnt try to cop an attitude til around two months old. Specific displays include- pecking at you, chest bumping and dominance displays with the others/fighting.
I have 3 roosters (that was our luck in a straight run). I raised them from chicks- picked them up, pet them everyday (yes, everyday... even though it was harder around 3 months). They are now 5 months old and i have never had a major problem with them yet...only once at 2 months did the lead male peck me, i flicked him on the beck and he never was aggressive in the least bit again. I have heard so much about bad roos and i really think that its how they are raised.
For example, when I got 3 barred rock hens from craigslist at around 2 months of age and they had an attitude...it took the past 3 months to get them comfortable with being pet. I wouldn't advise getting a roo at an older age...though they can be trained and tamed, is it worth the effort (i only did with the girls bc they showed some promise of eggs. lol)?