Asides gaming, comedy and general entertainment probably come in around second. Next would be makeup & beauty on par with music, but when I say music I'm not referring to your record label stars otherwise music would be number 1. More looking at self made comedy music youtubers, gear reviews, etc. There's quite a large following going on around that area especially with the heavier metal scene sprouting youtubers who do things making comedy vlogs ridiculing certain genres. Next would probably come with vlogs (not comedic ones, like life vlogs) on par with technology education and tech reviews/unboxings.
Surprised to see tutorials aren't being mentioned. Always seems like there are a lot of how to videos as well as educational stuff. Wild and domestic animals would also have some pull I'm guessing as well.