Role players love their dice, but not all die are created equal. While percentile dice require you to roll two different dice, it's still less unwieldy than using a D100 like the one pictured above. I'm sure you can imagine it doesn't stop roling very easily.
The Robot's Voice has compiled a list of the 10 most shameful dice of all time and while I don't agree with all of their decisions (I'm a sucker for crystal dice no matter what anyone says), their criticisms are hilarious.