Same here, The coolest keycard I can remember having was one that was gold in color when I stayed on a club floor at some IHG hotel I can't remember right now. All the other keys I have recieved have been plain white with a stripe and some boring logo on them.

A place I stayed at In ZLO once had real old keys, it was like a skeleton key, but a little different. They didn't want you leaving the place with them in your possesion though, you had to check them at the desk.