The Rascal is found in caves and/or abandoned mineshafts. If you find it three times, it will reward you with an enchanted iron tool. It looks like some sort of blueish hunchback with a backpack. If we vote for the Rascal, we will have a fun little game mechanic that, let's face it, isn't very useful once you have your own enchanting setup.
The Tuff Golem is, you guessed it, another small golem. It will randomly turn on and off and walk around holding the first item they pick up. A block of wool can be added to the recipe to give it a colored cloak/shirt/cloth. If we vote for the Tuff Golem, we will get a moving pedestal.
Personally, I'm voting for the Sniffer because I think it adds so much to the game. Happy voting!