[SIZE=7pt]I like ones with colour[/SIZE]!!! xP
As long as the font isn't hard to read, like this (it's hard, isn't it?), then I like ones with fabulous funky fonts (alliteration, see? Lol)
I also like ones that are spaced out.
I don't like ones with all those virtual pet links in, particularly zooreka ones. In fact, I don't like any website links in Signatures.
I don't like sad, depressing ones. If your sad, go say somewhere, else, right? No one here can really help you. It's the Internet, for crying out loud!.
And I don't like ones that are over-randomated.
I don't have any favourite's though... =D