3rd was extremely slanted to the players favor. to me it felt (as a DM) that the writers of that version were pissed off players who had a dictator DM in the past, and wanted to rectify that. It ended up being no fun for anyone in the group after a while and we reverted back to 2nd. YMMV
4th was them attempting to make World of Warcraft into a table top game. If you wanted to play WoW, then just get on a computer.
5th I haven’t played it yet because I’m far too busy making things.