I play both ways. If I'm trying to Rank up a gun, get Bounties or Rank up some armor I kill everything in my way, but I don't go out of my way to find a target so I can rank up my upgrades. If I'm working on Vanguard Points or rushed for time I rush thru. Those that don't like it can either Kill off the Boss for me or hang back and enjoy the carnage. Either way I'll be there helping you fire off the last few shots or reviving your dead carcass because you ran ahead and can't defend yourself. Everybody plays different and honestly if you rush ahead I can only assume you are capable of killing off the Boss in the end all by yourself. If that's the case then why worry about me hanging back having a good old time.