It could include either entire publishers, or specific studios, but I think it would be a cool list.
For the record, these are mine in terms of overall quality
1. Nintendo
2. Insomniac
3. Valve
4. Blizzard
5. Nippon Ichi
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs










