AzuriteReaction is the most real-feeling man on Youtube. He actually doesn't mind talking about his personal life and is the reason I say "Done like Dinner" so much. As a plus, he introduced me to some really weird games (and some cool ones, like Tribes).
MikenNemonic is such a monotonous guy, that it's just so funny to hear him overreact to strange occurrences.
(If you want to count non-youtube-based streamers, then Joel or Vinny from Vinesauce are awesome too).