Nintendo is definitely tops here. They may overcharge for the Wii but they're delivering a relatively cheap console with innovative features, though it is lacking in the games dept. (only partially their fault).
Second, I would put MS because of the RRoD problems. But, unlike other companies, they're trying pretty hard to fix things (first the one year warranty, followed by three years for RRoD). Overall, I think they're the company that is trying the hardest to make customers happy. Then again, they need to because they're still the new kids on the block and they royally f***ed their hardware.
In a very distant third is Sony. Their constant lying is well documented, none of us here need to list them all again. The entirety of SCE needs to be cleaned up, obviously Kuturagi wasn't the only problem. Their entire marketing dept. is operated by giant douches.