See, this is what I'm trying to figure out. I change it quite a bit cause I be thinking "Damn, I'm too serious" then I think "This is too playful" but I don't get enough messages either way to figure out which works best.
Same problem when i used to use it. i would send females serious messages on some "hi i'd like to get to know you" type shyt. Didn't get very many responses.
instead stick to jokes or just saying outrageous shyt. Lines that have worked for me:
"You got some nice lips, do you know how to use them though?"
"i know you want me, ;)"
"i can feel this sexual tension through the computer, when are we gonna meet up?"
"Ayye, want me to take you shopping?" (don't actually take them shopping, will get them talking though)
i had a bunch more but i haven't been on pof in a minute and they deleted my convo history.
Just play around with it. Put up funny pics. Spam all females the same message. You message 10 females a night you'll get responses.