[Boudica]

Maybe something related to the name itself, something Sinister looking would be nice.

Smokey/Misty/Grudge.

This sounds like an interesting idea, although I can't imagine an actual image. Maybe something more devilish?

Search up "Grudge Texture"

Along the lines.

Some kinda abstract design with loads of thin white lines curving and whatever. Not sure what you call it.

Currently I think the only good one is this. The others don't fit in at all.

I agree, maybe something like this?

https://encrypted-tbn1.gstatic.com/image...hL6hPtr2kQ

Anything that fits well with the theme base color.

Oh the grudge one looks cool, you could easily edit colours in PS.

I think anything with white highlights doesn't look right so what we've done before, is edit a bunch to make it blend. We can keep this in mind when selecting backgrounds.