Well guess you can't change the negativeness of MTF even if you try. For me Murray is the most boring to watch strokes wise - Djokovics forehand is quite interesting even if not his best shot. Neither of those 2 have the charisma of Nadal or Fed though. Both of them are so unique in their shotmaking and different to each other that it makes an intriguing mix.
Love watching Nadal's practice - just a different level of athleticism to the era of Sampras etc.
Well you didn't call this "interesting strokes in slow motion" did you? You called it "poetry in motion" and as much as I admire Nadal's athleticism I wouldn't describe Nadal or Djokovic's strokes as looking "poetic" or graceful.
I won't commentate on Murray so as not to offend.