As a PC gamer, I'd have to go with Microsoft. They've been bringing their games over here and enavling crossplay, which Sony refuses to do. However, if I had bought an xbox one for the exclusives, I'd have considerable buyers remorse at this point.
Sony did well at first, but they have been really slipping these past couple years. Nintendo are... hit and miss. The Switch is the system I've been asking for for years, and they're bringing good stuff to it. However, it all falls apart as soon as the internet is connected.