I am thinking, in terms of GOING to a store, not BUYING once you are there.
When winter sales began, I wanted to buy a couple of Sandro Ferrone dresses. I have one of their stores very closeby, but I stated to my mom and aunt in a conversation that I was going to the store in another town, Nettuno, only because the lady there is nice and very helpful, but mainly nice.
In the closest store, I went once and I was looked at suspiciously, as if I was going to steal something. My MIL and SIL had similari experiences there. Yesterday I was walking and saw a beautiful dress in the window. Then I saw the lady, and thought to myself - nah, I am buying this in Nettuno.
In both cases the ladies are the store owner. And no, I am not particularly known in any of the two, I am not really a regular customer.
Back to you: when you decide which store to check, how much the sales staff influence you?