Like everyone else, I like the quality of the average poster on this site. I think one of the best reasons to read here as opposed to elsewhere is
dBoard Version 1.0
Innovative software from PerSoft 2004
I like being able to jump into the middle of a conversation and immediately being able to trace it back to its roots. Also, the POTM threads are a great way to catch stuff you would probably otherwise miss.
All in all a very satisfying intellectual experience.