First off sorry if this has been done before, but I did a quick search and couldn't find anything similar.
Secondly this is completely opinion based and purely out of interest as opposed to having any real point.
Thirdly the limit is 10 on the pole so I'm sorry if your favourite developer isn't included but these are 10 pretty famous ones and tbh I'm trying to make a spread rather than say having 4-5 xbox/PS3 exclusive developers.
So go for it, which is your favourite developer (and if you have the time why)?
EDIT: Sorry for not including Valve, they are also one of my favourite developers, but with my overuse of Steam I barely consider them a developer at all (not sure why). I reckon Double Fine is the only really weak link in my list and would replace it with Valve if I could, crap pole maker is crap, sorry.