I have two. The first is a mug from the Charlie Rose show that was left behind by a college roommate when she moved out of our apartment for the summer. I just got it back after not seeing it for 8 years when my mother brought me several boxes of stuff I left in her attic. I don't know why, but I seriously love this mug so much. The second is THE best one, it has Data from Star Trek: TNG. He is a simple light grey line drawing standing on a transporter. I'm pretty sure at some point he must have disappeared when hot beverages were put into it, but I imagine it's pretty old so it doesn't work. On the other side is a fake Brent Spiner signature. I found it at a thrift store and was so psyched that I yelled "YES", because I had been looking for a good Data mug on the internet for a very long time. I also have this really great little demitasse that isn't particularly special, but it's the perfect size and I really love it. I have had a lot of very special coffee mugs, but this is my current collection.