I prefer 3rd to 4th, then again I don't mind super dense and sometimes obtuse rules systems (Like decking! Authenticate User for Godlike). I don't mind the general ideas behind fourth, being to group things together so it's not the Chase Scene, Rigger plays everyone else gets a coke, Decking, Decker plays everyone else gets another coke, Combat, Sammy goes etc. I really don't like what they did to the setting (Technomancy, the whole System crash storyline, killing Captain Chaos for NO REASON) so I've been reluctant to really dive into it. With some house ruling, 3rd is fine.