I am not a fan of Barred Rock, I think the barred pattern in general is kind of unattractive. I am also not a fan of Faverolles (spelling?), the weird coloration thing gets me.
I actually really enjoy my CornishX when I have them. They only get gross for me when they aren't moved often enough, mine were fairly pretty birds once they got their feathers, which not all did before the Big Day. They're pretty docile critters, they're delicious, and they're cost effective to raise. I've never had leg injuries, and I process them immeidately if I start to see one looking not-quite-right. So far my several batches lived their 6-8 weeks in clean, spacious surroundings getting treats and attention like the rest of my birds. Nothing horrible or overly freakish occurred, and they were pretty content.