I grew up in a house that had a three story library with rolling ladders, so I have been a book junkie since I was a tot. My father knew every used book shop on the eastern seaboard. And when he died recently, some of the $2 books he picked up sold for $12,000. He was a true lover and collector of books.
I, on the other hand, like my books NEW. So, I am dangerous in ANY bookstore, and if I had the funds, I'd need to shop with a cart anytime I set foot in a store. Many will be sad to hear this, but I am practically a founding member of Amazon and they used to send me Christmas gifts! (Now that they have made the big time, of course, that has stopped.) The nice thing about shopping there is there are fewer impromptu discoveries of books. I buy the book I was looking for, a few suggested additional books, but I don't end up in "other aisles" for the most part, so it saves me money.
That being said, I do love our local bookstore as a source for local authors and local hiking/boating/fishing/rafting books and maps.
When we moved here, we donated boxes and boxes of books because my husband didn't want to pay to move them all. He made me give up out all my mystery and spy novels, several hundred of them. Drove me crazy to do this. The new house has built-in shelves in the kitchen (for cookbooks - five shelves), the bedroom (not full yet, this is where I keep my "pending" books), the office (naturally, for all that work related stuff) and a library (not remotely three story and no ladders required). After four years here, the shelves are needing less and less dusting as the books fill them up.
We had a used bookstore a few years back which was largely populated with stuff I've already read. A new one has opened which I haven't visited yet. I also took a number of my father's books before we disposed of his library. (Like having a FREE used bookstore!)
Summing up, I mostly frequent Amazon, but no bookstore is safe from me.