ok, Im going to dive in here seeing as how I am bi. I personally am nicely trimmed with just a tuft above and I enjoy a woman who is both way as long as it doesn't feel like sandpaper.
Same thing regarding a guy. I prefer either grow it out to where its soft or keep it shaved. The sandpaper feel on your lips (either of them) is just a turn off.
Seriously, I like a nicely trimmed bush - maybe because of my age or maybe because it's so rare with younger women over the last 20-25 years. I predict hair is going to make a come back.
You know it's not like you're getting a tattoo or something permanent. You can always shave it back to your silky smoothness if you don't like the au natural feel.