I probably encounter at least one vlogger every visit, though I'd wager the vast majority of them are talking to a very small crowd. They're all trying to be the next TimTracker and perhaps not aware of what a VERY oversaturated market it is. Also, every one of them thinks their own personality and take on visiting the parks is somehow unique, but they aren't.
The fake enthusiasm and showing up to every new thing are the most annoying things to me. Disney could open a refurbished bathroom and hundreds of these guys will show up to film it. As long as they don't talk over attraction experiences it isn't really that big of a problem though. Also, filming themselves eating. I don't know why they ALL do this and think anyone wants to watch it.
I think, slightly more annoying, are the live streamers. I don't want to be in your live stream, and I know I won't be edited out.