A lot of bike shops have gone downhill, just concentrating on sales, often a one-brand shop.

One in my area is way above the rest, my fave, I first learned of them in 2002 because they were the only ones in town that had used parts, I was visiting, someone else told me about them; I was volunteer-fixing a locally made pedalboat at a non-profit boating center, that blew a crank, and was able to get a replacement crank cheap. These days they still have huge bins of used parts, sorted well. They appear to have a great service department, I haven't used, but it's open to the sales floor and I can easily ask a question about parts compatibility or such, and I give info in return; "Bicycle Quarterly available to read free at <x> library!" (BQ is a bit expensive at $44/year/4-issues.) Independent shop with multiple brands, good used bikes, even used accessories. I've bought a lot of stuff there.