I can pull up Amazon and read ratings/reviews, see what kind of problems people ran into with products, and make a reasonably informed decision with my money.
In a big box store, I feel like I'm taking more of a chance unless I stop, scan the barcode, read through reviews. Meanwhile, I look like a silly guy who can't make up his mind.
Yes, I enjoy obsessively comparing reviews/ratings for potential purchases. Even the really cheap/insignificant ones...