My local record store is one of the top indie stores in the country carrying both new and vintage vinyl. Tattoo's up the wazoo, hair, over sized earrings, and of course everyone wears black. The place leans toward grunge and metal with a super healthy dose of everything else. It's a huge store complete with stage for live music. I'm 60, they're not. I'm in there every week for something or other. New and old.
The last couple of times I came in they impressed the hell out of me . They see me and start playing either something I've recently bought, something I've talked about with them, or something similar that they figure I might buy. That's pretty cool.
And we're talking new music like Allah-las, Nothing, Lana Del Rey, The Ravonettes. Muse, M.I.A., etc.
They know what's on my current wish list and will put the stuff aside for me as it comes in. An original Doors S/T (Mon), and the new Joe Bonamassa.
They even exchanged a reissue "Sticky Fingers" for me for what was supposed to be an original after I checked it out at home.
Beside being extremely knowledgeable, they are extremely helpful. That's what impresses, and that's why they get my business.
They would tell you knowledgeable customers impress them.