really, big cocks are nice and all but you have to know what to do with it and enjoy getting serviced. No fun to have a huge cock and a dude who just lays there, silent or is timid about what to do with it. Nothing more distracting than a guy "sorry" is cock is big and I may gag or get a sore jaw. That is my "worry" and I am rather happy to get to complain about a sore jaw, LOL.
Sometimes the smaller cocked guys have been way more fun to suck than some really large guys because of their attitude and personality. I guess it is not always all about the cock.
I would rather a smaller cock with a dude with a great personality and knows what he likes. But of course, all other things equal the big cocks wins.