Selling memberships: It always feels awkward to insert "Are you a member" into your conversation with customers. It really is a neat benefit to the customer, but customers get annoyed especially when every sales associate they've talked to that day (or in their lifetime of shopping) asks this question. Some sales associates do a great job of not making this question seem out of place. Membership sales can effect your hours and your raise. It's the company's measurable performance goal for you as an individual.
It is still retail, so you might seem like all you do is pickup and zipup jackets and clothing that messy people leave everywhere. You start to love the people who put away and zip up the mechandise they were looking at.
Very rarely get an rude customer, but they do happen.
Customer service deals with a lot of upset customers and some that take advantage of the company's return policy, returning "well-loved," not faulty merchandise that at times have been 5-10 years old. People return things that should be in their own garage sales, not REI's.