12 my favorite number and almost my favorite die. It's big, bouncing* and beautiful :-D
The good news is, it's part of my not-famous-yet-but-soon set; d4, d6, d8, d10, d12, d20. Seriously those dice are great, bigger than commerials dice and they bounce really well!
*when ordered in plastic, metal is quite heavy so it roll well, but doesn't bounce like plastic...