The YouTubers I watch the most are Game Grumps, JonTron, NSP, ABrandonToThePast, Marriland, DidYouKnowGaming & Helen Anderson.
I used to watch a lot more YouTubers such as DanIsNotOnFire, AmazingPhil, Crabstickz, KickThePJ etc... but it's rare that I watch any of their videos now ^_^