I have a few favourite Presets of mine...

Capall, my kelpie character.
It's rather hard to make a horse fit onto a canine form...

A character from a comic I read (and recommend). He's kind of a weird transforming flesh-metal creature, that is also a scarf. I loved drawing the skull for him.

The Entry to last(?) years Preset contest. I still love this preset- as it's my first ever truly animated preset. too bad I don't actually have a character for it.
and Finally

I don't play this character anymore, but I did enjoy making his preset- as simple as it is.