Grunge

I really like this theme, it takes a rather different approach, Don't see many themes like this. I use this primarly as my darker theme. Also when I use this on my laptop at schools I get many comments how I got my pc to look like that. So thanks :). My only recomendation is the Three buttons upper right corner (min, max, close) It may be just im color blind but i have a rather hard time distinguishing them. To me that is the biggest issue, but i usually close windows with key commands anyway so its a null issue.

Toma i didnt see your email so i will leave it here
I just noticed something. The icons animate with there corresponding action. Not sure how i missed that. I can use it well enought as is.
Mainly because it sticks to the conventional order of min>max>close.
However if you want to make it more color friendly :). To give you an idead im about 80% color blind bout the only colors i can distinguish are the ones i think you are using in this theme red, black and white. So im not sure why i have such a hard time with this theme. I would say a compromise is making a sub theme, Some people may like it as is. And add an overlay of what the icon does only on hover over. I.E. Min has the -, Max has +, close has X. This would only be on hover over to not conflict with theme. And it would have to be done, in a contrasting color. Im not sure the color you would use. Not going to make recommendatinos.