Retail is both easy and hard. We have a tackle store in a vacation area. Our customers tend to come in waves. The store is either swamped or dead. I'm here more than 12 hours a day, almost every day. So it's a huge time suck, but I do have time throughout the day to hang out on the AHA forums.
Some of our customers require a lot of education, much like those in a homebrew store would. This can be either really fun, or really frustrating, depending on who you're trying to teach. Dealing with people all day can be exhausting too, but in a different way than mucking out mash tuns or carrying sacks of grain around.