Microsoft (favoured company) - Poor reliability on the console for most of this generation.
Sony - Cutting rumble meaning I had to buy another controller to get a function that should always have been there. Too many updates instead of 2-3 big updates a year (preference for me, I realise others might want new additions quicker)
Nintendo - Waiting too long for localisation of games after launch. Not enough games targetting me as a gamer.