The Joker is not my favorite Bat-villain (I prefer Two-Face). Yet, I plan to do Batman's rogue gallery and it wouldn't be complete without the clown of crime.
I had a lot of fun doing this.

Base : MIB figure with extended legs, sculpted tie and vest.
Head : SHS Reed Richards with sculpt
Forearms : Sabretooth (Wolverine Origins)
Hands : Destro
Jacket and pistol : Golden Compass Lee Scoresby. The jacket was recut to be more comic-accurate.
Hat : Indiana Jones
Cane : made with a cocktail pick