Ok, all of y'all breeders, help. Please. 
I have a batch of 17 week olds, straight run. I plan to keep one roo, process the rest (roos, that is!). So I need to start thinking of which roo to keep. I can read the breed standard ) to see which roo fits the standard best. What I don't know is: which faults are easiest to get rid of? LIke, if I have a roo whose worst fault is, for example, black legs, do I keep him over, say, the one with incorrect coloring? And what about the one who has maybe legs that are too long? HOw do I choose which fault to tolerate in this first generation, and which to be sure do not get to reproduce? And if I have a hen with the same fault, of course I wouldn't want to raise any chicks from her, using that roo, which raises another can of worms, deciding which hens to hatch from, partly based on which roo I keep!! 
I wish I could give that can of worms to the hens, because they'd get rid of it in no time!
Thanks for any suggestions.