I've been favoring a crystal Glencairn lately but last night I rediscovered an old fave; it's a small rocks glass with a little Mt. Fuji in the base. I have two of these and one is "frosted" on Fuji's peak. The way the whiskey is reflected around the base of the mountain is very cool.
Here's a crappy iPhone photo, hope it illustrates sufficiently.
PS- shit! Sorry about the rotated photo. Not the glass rotation I was referring to.