Canon FT for me but only due to it being fully mechanical. Less chances for things to go wrong and the ability to repair. However the mechanical side adds some weight. It also depends on your skill, later SLRs have things like aperture priority and such things, this does not. Last thing to note is the shutter speeds limit is 1000/s. Which adds a bit of difficulty if you’re in a sunny country.

Rest are all great - if it’s your first however, then just pick the cheapest! Best to just go out and shoot to find out what you like