I do have that extension installed already, no worries on that end.

I know one thing that I would rather *not* have, and that is a very white/bright background image. I don't need a completely dark-mode layout, but I know that something too bright on my eyes won't work out for me in the long run.

I like rounded user images in the layout.

Honestly, I don't know what other kind of information would be useful for you to have... do you have like a list of questions I could answer that would help you out? I've never designed or commissioned a plurk layout project before, and I'd rather be helpful than not.