So, everyone has one - a place you've received excellent customer service, perhaps bought your bike or the place you take it for servicing when you can't get the chain you've removed to clean back on (don't laugh - it so, too, could happen).
Anyway, I'm not the least bit bike savvy (duh) and will be the first to admit it. I rely heavily on my favorite bike shop where I have bought both of my Treks and where I consistently receive excellent customer service. That would be Budget Pro Bicycles in Eagle Rock. If you've not been, I highly recommend them. In terms of prices, they are not cheap, I will admit (they are family owned, however, and do offer discounts). But I've never had an issue with them and I've been going to them predominantly (other than a trip or two to Performance or Pasadena Cyclery) for the past three years.
Oscar (who owns it with his wife) and David are the two reps I've dealt the most with in terms of customer service, and they both have been incredibly helpful. And, believe it or not, they don't just see a dumb blonde walking in and try to rob me. They have steered me away from superfluous purchases (e.g. I wanted a pair of $250 shoes just "because" and Oscar told me my $89.00 Shimanos were just fine and that I don't need new ones until those wear out - and he could have easily sold me the other shoes!).
So, if you have a shop in your area that you can honestly recommend, please share.