I don't really like Pewdiepie or Mark, both of their reactions seem to be WAY over-done which comes off as kinda annoying to me. I do like Jack though, his reactions seem much more genuine and his mic quality in the videos and the recording quality is pretty good, and his morals, ideals and such for his community are actually really good and he seems like a very decent and caring person. (One point in time I did enjoy PewDiePie, but that was back in 2011 - 2014 when he was actually really decent and funny)
Plus his jokes are actually fresh instead of just beating the dead horse with old jokes, over-reacting or failing to fit in all the time