I'm having this problem as well.  I have an Ameracauna rooster; he'll be a year old April 6th.  He's pretty feisty...fortunately he doesn't have spurs yet, just little nubs...so while he startles me, I'm not afraid of him at this point because I know he's can't hurt me.  But if you aren't careful, when you go into the coop to get the feeder or the waterer, he'll fly up at you.  He's received a few swift kicks, which will back him off, but not for good.  When I got my chickens, I read a great deal because I really wanted to avoid an aggressive rooster; we had one when I was a kid that my dad wound up beating to death with a tobacco stick...had to just to get it off of him, the thing wouldn't quit.
Amos (my rooster) has been a little extra pissy lately.  I have a broody hen, and I wonder if this is why?  I let them all out of the coop today (first time in quite some time...the coop has a run, they're perfectly fine in there, I just like to let them out into the yard occasionally).  I went to hang out some towels, and Amos stalked me all the way across the yard.  I keep telling my hubs it's off with his head if he attacks me, and the hubs says all roosters are mean...but I keep reading on here that they aren't.  
Is it okay to clip their spurs?