Yes, I love any signal of she is interested on having her much longer than mine: feeling her hair while caressing her waist, rubbing my head with her tongue and her pussy immediatly after getting my head shave, etc.
I always hate it if my hair accidentally gets into a guy's face, and he like freaks out / spits it out and stuff. Super major incredible turn-off. Why can't he just swipe it to the side and continue with whatever was happening, rather than act like he just walked into one of those early-morning spider webs? :l
From my experience, guys like it down. Mine is almost down to my belly button and my guy is always grabbing onto it. I don't like putting it up because it's a big turn on for me when a guy pulls my hair, I love it. I also have a move where I'm about to go down on my guy so I flip all my hair forward and it all slides down slowly on his chest and stomach, he loves it! As long as it doesn't keep going in his mouth it's all good haha