Here is the profile text I use for mine, maybe anyone struggling to write something can adapt it a little:
Light-hearted, nothing negative mentioned (I see no reason to ever mention negative things about yourself), and gives a little of my character without going over the top. I used to try and be much more clever in what I wrote, but in the end people aren't looking for literary displays of genius, they just want to know that you can string a sentence together, have some interests, and know a little about what you want in life. Seems to get me a fair few replies... but my photos are decent so that helps I guess.