Dear the world, My new computer's name is 'equanimity' and I need a high-res background for it. Recommendations?

A big willy.

It's a work computer, that might be a tad inadvisable

Well that wasn't made clear :p

True -- this is a work laptop I'm seeking a new backdrop for :-)

I would proffer one of my own photos, but I've never been particularly proud of anything I've done

I prefer to not use photographs for my work laptop too -- My desktop at home uses photos and it helps me differentiate :-)

How about something by @Jimllpaintit