Oh it's really all about personal preference. I mostly subscribe to tech news & reviews and "let's play" type gaming content, along with some cooking/woodworking/metalworking stuff. Off the top of my head I mostly watch MKBHD, Tested, Cinemassacre, CynicalBrit, Lazy Game Reviews, Frank Howarth, and enough smaller channels to fill in the gaps.
Edit: Oh and LinusTechTips, I can't believe how long it took me to get on board with that channel.
Edit: Oh and LinusTechTips, I can't believe how long it took me to get on board with that channel.