I think BW/gymnastic exercises are underrated. For whatever reason, they seem easier on the joints, maybe because the ~shear and ~compressive forces are much smaller, while the torque can be very high. (I won't say they're "more natural": some might be considered so, but humans have had to exert themselves against external resistance since like forever)
Also, advanced BW exercises have the advantage of requiring no equipment, so they are great for military personnel, business trips to places w/o gyms etc.
(with the disclaimer that you can't replace (at least not totally) the DL, BB squat, DB/BB row (mid-trap&rhomboid exercises), and maybe even curls, with BW exercises, although they (BW ex) can be used to maintain strength)