Thanks Mart,
I've seen most of them now to some degree, but not Tom Gringat or Guido Hopp so I'll check them out. Will does ramble a bit, but ad libbing stuff like that live is really difficult, and he's very generous with sharing technical knowledge. International British Modeller is another interesting channel; he builds beautiful models but sadly there's no real insight into how he gets his results. Genesis models has a lot of good stuff for beginners/ intermediate too.
I like how the channels reflect the personalities of the modellers. Paul Budzik's channel is all lounge-y with its jazz music and his own laid back delivery style. His knowledge and generosity are amazing.
I still think David Damek's channel is my favourite though; he manages to comunicate a lot of info in digestible chunks.
thanks for your suggestions, Mart, I'll check them out.