Hah! This is a topic I've avoided for a very long time. One of my mixed blessings is that I tend to think about everything. It's a little bittersweet because when I say everything, this includes hair cuts... and when I say "think about" I mean, of course, "way too much." Thus, my hair is long... because I'm unable to decide what looks good short. Specifically, of course, what looks good short on
me.
Hence, I wear my hair strictly in a pony tail. I used to let it just fall all over the place, but I got really tired of it tangling all over. In a pony tail, it's rather neat, albeit a bit... I don't know what to call it. Frizzy? It sure isn't styled or "teased to perfection." Currently it's down to... the sixth vertebrae, perhaps? It's an inch or two short of being long enough to donate, anyway - which is my current plan for the future. At some point, I intend to hack it short and donate it, 'cause I expect the rumors about college clashing with free time are true, and hair takes a fair amount of time to dry.
That, or I find a lady friend (or friend period, I s'pose) who likes to play with hair and styles.
Now then, to answer the first bit of the question, nearly anything but a mullet will do, provided it isn't remarkably unkempt. I don't think mullets look attractive on anyone, male or female.