What I'm about to say might upset some of you: I don't own a set of matching coffee mugs. And I wouldn't have it any other way.
When it comes to other tabletop gear, matching is key to me. My plates and bowls go together, I have baskets full of coordinating cloth napkins, and I have a complete set of matching flatware (with serving spoons). All of these things look great together on one table — but my mugs are all sorts of random.
An Ode to Mismatched Mugs — Mugshots