Liquid Metal Slime, the usual appearance.

Torpedo Ted, the shape I usually take when underwater.

Banzai Bill. As with Torpedo Ted, I can stretch to this shape if the right situation presents itself.

Cat Slime, a form I usually only take when entertaining others.

The Met hat, which was a gift given to me in 2013.

Squinting. Slimes can do that.

Dark robes, possibly to create the illusion that I can be "normal" height despite usually being 2 feet tall.

Disclaimer: Wizard is actually Carock from "Zelda II: The Adventure of Link", but the robes can still work for this form.

Slime hug. :)

The fedora hat, which is sometimes worn when the Met hat isn't.

As for the... extra stuff... in this image, it's mostly because I think it looks funny.