I enjoy GameDave, Gaming Historian, SNES Drunk, Daria Plays, EC Meyers, Jeremy Parish, LGR, and Nostalgia Nerd.
Game Dave - Entertaining personality. He will do a skit with most videos. Generally will focus on one game. I like his Famicom ones the best.
Gaming Historian - Long format documentary style videos. High quality.
SNES Drunk - Short straight to the point reviews of games you may have missed. Easy to like.
Daria Plays - Reviews mostly RPGS. Good quality and does reviews and let's plays.
EC Meyers - Will do product reviews and live streams of NES and homebrews. The live streams are where he shines. Great at interacting with the audience.
Jeremy Parish - Host of Retronauts. He is going through games chronological for the system by year for each console. Similar to Chrontendo, but much shorter in video length. Has done Gameboy, virtual boy, and now on NES.
LGR - Mostly retro PC. Reviews games, PC, odd products, and builds retro PCs. Great personality, very entertaining. I'll watch anything he puts out.
Nostalgia Nerd - Reviews PAL stuff. UK micro computers, Mega Drive, etc. All around good for things I never heard of.