This is a wish / request.
GTK has plenty of warm themes.
One of my favorite is Industrial. I believe this engine has been with gtk for quite some time now.
I would try to port it myself, but I am currently involved in too many projects as it is now, with what time I have.
So, I wish someone would port GTK theme Industrial.
I also realize Plastik is very close. Maybe I could hope for plastik to become more configurable ;)