I think choosing to exclude PayPal would alienate more people than I'd be comfortable doing. I used to prefer PayPal, but lately after having been using them long enough to experience their darker aspects, I tend to avoid them when I can. With that being said, I expect others to eventually have a bad experience using PayPal such that they defect, but I don't feel there would be enough people with a PayPal aversion to warrant not providing the option in the first place.