Sony: 8/10. A good press conference that showed some great stuff and demonstrated sony's attitude to the whole drm debacle. But lacked new exclusive titles
Ubisoft: 5/10. Showed some decent content that kept me interested but "The Division" demonstration made the conference worthwhile.
EA: 3/10. A lot of boring sports and stuff and the cooler games were only demonstrated in underwhelming short CGI trailers.
Nintendo: Didn't watch.
MS: 6/10. They brought the games and held one of the better E3 conferences. Nothing outstanding however.