Don’t leave your profile blank. Give people a reason to pay attention to you, something in common and something to ask questions about. People will also search for other people with certain words in their profile. So put things that you do or like and which other people would search for there.
I had the questions, “What’s a MILF” as my tag line not because I didn’t know, but it was a great ice breaker. Say something that can start a fun conversation. Don’t waste that space because people have to make a decision about you based on that and a blank profile looks like you’re hiding things.