I have been to lots of resale stores and I will pass on my views.
I can say that nearly everyone I have been in has had that "old building" smell and it is a HUGE turn off. Some even smelled like mold and made me start itching. So a very big impression that your customers will have is not of what they even see. For example: 2 consignment stores in my downtown neighborhood. I walk into one and am instantly bombarded by cinnamon and floral odors to cover up the musty smell. Well, they could have the entire store filled with my size clothes and everything be priced $1.00 each piece and I would never set foot in that place again. It had cute decorations and looked great from the street but it went out of business in less than 6 months. The one next door smells like it was cleaned...yesterday? The fragrance is extremely subtle but still there and not at all offensive. Kind of like a being out side after a light misty rain. Where the air is fresh and clean.
Another comparison: The first store is so packed on the rack that you have to shove the clothes to see what you are looking at. The racks are close together and confusing. The sizes are all mixed up and you have to keep asking where different things are, like where are the size 18 shorts? or the sz. med. short sleeve tops, etc.... The other store all tops are on 1 long "parallel bar" type rack and it starts at XS and goes through XXXL and the clothes and hung in each size section by color. The next rack is all the pants sized accordingly, the next all the dresses, the next all the suits and sets, very easy to navigate.
The next issue I have with the 2 stores is lighting, one is gloomy and dark the other is bright. They are both in historical type buildings and have similar features. The good one has the antique brass chandeliers from the 1800's and a few secondary lighting fixtures, there are no spots in this store where you can't tell exactly what color something is, or what condition it is in.
Another issue is what to do with your children while you shop. Another store I visited several times in another town had a small room where the kids could go and play but it was in the back storage area and I couldn't hear the kids from anywhere in the store so I was constantly going back to check on them. The store I visit most has a small room off the main room and they have a small tv up on the wall that the kids can't reach, they have several toys that fit all ages from 1 yr. and up (not a single toy in that room is too small and a choke hazard), and I can hear everything being said from just about anywhere in the store.
So, my conclusion is: it doesn't matter what you have on the walls to make your store look good or cute or classy or anything. It is all about the 5 senses. I dont' even remember if the store I like has a single picture on the wall and I am in there at least 2-3 times a month. I don't feel like I need to wash my hands after a I leave the store, I feel like I need to wash my hands before I touch anything in there because it is so clean.
Just my 2 cents worth.