I'm not drawing up a psych profile, I'm just saying to myself, well, he clearly hasn't bothered to get to know me (which he's indicated by not noting anything he read in my profile), and there's absolutely nothing there to inspire me to write back.
OKC, in particular, asks a lot of a profile. That I took the trouble to answer all that stuff, with thought and feeling, is gonna require more from a guy than an uncreative looks-like-a-copy-pasta message to get a reply from me. I don't feel any obligation to 'bang out a 10 second response.' That's not why I put up an ad. If he can't be bothered to try to present himself in the first message, why would I imagine he'll get 'better' later?