LEGO Minifigure Collector:

Star Wars (not all variations)

Batman (completed)

SuperHeroes:

...Batman II (completed)

...Marvel

Collector Minifigures (All Series)

Avatar (completed)

Toy Story (not all variations)

POTC (completed)

Harry Potter (Starting with 2010 release)

Lord of the Rings

Ninjago

Monster Fighters