1. Super BunnyHop. Well made and informative videos about the industry and his opinions about various things.
2. Linus Tech Tips. I hope to build a nuclear powered PC submerged in liquid nitrogen one day.
3. The Retro Job. I love Mega Man and Nico is a pretty entertaining and informative commentator.
4. Metatron. Educational content about history (Japanese or Roman usually), pretty cool for nerds like me.
5. Geography Now. While it's more "edutainment", Paul has a good message behind his videos and I can really appreciate what he's doing.