I started collecting about twelve years ago. I must have over 200. My favorite is a Mickey shot glass my mom bought at Epcot(?) several years ago. It is shaped like a beer stein with a pewter lid and has Mickey etched on it. I don't remember how much she said she paid for it, but I remember it was expensive.
I've got one from each park from a trip two years ago, and bought a few this year when I went also. (Including a few from US). My favorite from this year says "I survived the tower of terror". Not a really great looking shot glass, black with the wrining on it, but I love it. (This was my first time on TOT and I had to buy it!)