Having recently been to the LA Board (I will be heading down there on Valentine's Day), I agree that this board is not that busy. Some, but not all, or that can be attributed to population difference between LA and PDX.
When I first started cruising around this site a few years back, I also felt it was a pretty slow board but I think that is improving slowly with time. I have tried some of the other sites from time to time, but just seem to prefer CH.
Now, want to trade Valentine's Day ideas in PDX for VD ideas in LA??? ;-)