Seriously this just dawned on me:

-short

-bearded

-unusually strong for his size (at least in books)

-fights with an axe

-skilled craftsmen (although only in one occasion, creating a saddle for Bran)

-wealthy and loves gold (these are pretty apply to all Lannisters)

-alcoholic (but it's not common for dwarves to go to whores)

-he even lived in a moutain!

-and he created underground sewer system

-Even his obssesion with dragons can be explained this way!

GRRM is known for deconstructing normal fantasy tropes and in this case he did it really, really well