I quickly grew tired of hop socks. I bought a few nylon mesh drawstring bags from my LHBS to replace them. They're higher quality and reusable, but I still don't want to use them.
So long as I'm not saving the yeast, I think I prefer to keep the hops loose, to let them really permeate the boil. I have a superstitious feeling that I get better utilization, plus it's just plain easier.
My current thinking is that I'll bag my hops on the first batch I make with a new Wyeast smack pack to keep hops out of the trub, then I'll harvest that yeast to make a batch with second-generation yeast. I'll also bag the hops in that batch. Then I'll wash the yeast from the second batch, and brew up to six or so batches from the high-quality third generation washed yeast, keeping the hops loose in most or all of them. (At that point, I'd only bag the hops if I wanted to wash the yeast again.)
I suppose I should qualify the above by saying that it still seems like a good idea to bag whole hop cones. They do like to clog my tubes, and straining the wort is a pain.