I don't watch many of them and tend to just look if an airline or cabin I have never flown is is being reviewed, but from the few I've clicked into:

Nonstop Dan - comes across as a total PITA, all is video's appear to be 1 long moan, but I will give him a tiny bit of credit for getting QR to insert a policy that if your QSuite booking is swapped to a non-QSuite plane, you can change for free (or so he claims)
Jeb Brooks - comes across as just a really nice guy
Haven't watched Matt's Planet - will take a look to see what I am missing
Sam Chui - Can't stand
Mark's Trains, Planes, trams - not a fan of the fleet update posts as some of the posts / aircraft types he lists are just wrong or he puts up old movement posts while speaking about new movements - I'll trust my own sources
TPG - Very annoying, always rave about the food / service on all the flights because it is pretty obvious the flights have been gifted by the airline and if I was in a cabin with them, I'd be p*ssed with all the videos and talking going on!
Luxury Travel Expert - great video's and give a fantastic overview of the product / service with no annoying chat

Pilot37