Maybe not all, but don't many, McGrath?
If you're in a room full of people, don't conversations start out with questions? "Come here often?" (*bg*) or "How do you know the host?" "What do you do for a living?" One doesn't walk in and say "My favorite song is Fields of Athenry - please comment as you see fit".
I agree with Praise and Joe and whoever else up there stated that without something to ASK, it's harder to start a thread. Not impossible, I agree, but more difficult. Maybe I'm wrong (often!) but it seems more polite to say "What's your favorite______" than to state my own preferences and hope that someone adds something (I think that was called Killing the Thread). So I just learned how to play a song on the guitar. Big deal, I probably would not start a thread about it. It's the song I can't figure out and need help with that would prompt me to start a thread, no?