I've enjoyed all John Connor actors and the character(except for getting turned into a terminator in Genisys)but something about the cameo/glimpse of future john in T2's opening scene has always stood out to me and really interestes me.
I'm fascinated by the future of the first two films and this actor has a unique presence about him despite not saying a word and only appearing for a couple of seconds walking and doing this
Plus john is only a teenager in T2/SC Chronicles and Dark Fate, Confused and scared young adult in T3 and an elite soldier with some command in Salvation but not what/who's he's supposed to be yet. He finally got to his destiny in Genisys..but then got ruined and screwed by Skynet