I have read some really nice profiles but out of respect, I didn't send them a message because I didn't think I was a good match for them. I have also read profiles that were very specific e.g. , ethnicity, height, age, weight, salary, church status, child status, position on the public health care option...just kidding. That's ok too.
I don't think you really know a person until you have a non-relationship type conversation with them. Oh, something like... world events, their favorite ice cream, book or what they did that particular day.