While it's been many years in the making I've become too much of a general hater to have a favorite. No company has been able to really earn my trust/fanboyism.
The reason being is that all of the companies seem to be concerned with pandering to the ESRB and such, making sure their games aren't offensive, and whetever else.
Some might consider it a lack of maturity on my part, but while I fear a game can get by without (Deviant) sex, and over the top gore and violence, I find it personally repugnant when a game is edited from the initial concept, or specifically designed to work around the existance of such things.
In a day and age when Rock Star edits "Manhunt 2", and actually cares about the whole "Hot Coffee" thing instead of just laughing off/ignoring the ESRB, companies like Troika go out of business due to (apparently) content related disputes in their RPGs, and even companies like Bethesda are freaking out and begging for mercy from the ESRB because of fan-made nudity patches, it's not like there are any REAL game developers who put the game and their vision before society.
I guess if we start seeing a company developing REAL RPGs and Horror-type games with an AO rating and the muscle to get it distributed, I'll become their fan. By this I don't mean stuff like those cruddy sex-sim games and stuff. I have little interest in that. But otherwise good games with some hugely over the top stuff here and there.
I mean heck, I was greatly amused when in Arcanum there was an option to have sex with a sheep in a brothel. It made me chuckle. But then look at what happend with "Temple Of Elemental Evil" (earlier build) over similar content. Not to mention changing the whorehose into a "dance hall" between Neverwinter Nights 1 and 2, not that anything really graphic ever happened there.
Not that I'm against being graphic with sex, depravity, or brutality. Just don't overdo it for the kind of game it is. Even if it's just for a couple of scenes, don't edit them.
Bottom line is, there are no game companies worthy of respect currently out there. At all.