I tend to gravitate towards watching personality driven, talky discussion type videos as I'm able to watch/listen while working on my animation YouTube content.
I currently like watching discussion channels like h3h3 and Philip DeFranco, but my preference for video is always changing lol
i don't really have a favourite type of video, if its funny, entertaining or even just an all round good video, i'm here to stay at the video :D i like ALL sorts of videos XD
Anything that's truly original. I have a lot of YouTube pals who do things like challenges and reviews and reactions and whatnot, but my real preference is for people who have a vision for something brand-new that they have to get out. It might not be the best-produced, but as long as it's something new and interesting, I'm happy to see it.