as far as Marvel are now concerned, Hulk has never tried to kill innocent people and has never actually put people in harms way (Bruce calculates all the trajectories and probablities that Hulk brings into being, when on a rampage), so again, no worries... it's like Superman stressing about getting a case of super-flatulance in Earth atmosphere.
and yep, Banner is King Hulk but, so is Hulk. all that proved was that Banner lived in serious denial about the nature of the beast. he wanted to believe that he was not capable of exerting control over it, probably because he enjoyed the license to be "mindless" (he wasn't truly mindless, of course, he always limited the Hulk's collateral impact).
seriously though, I'd really want to explore the possibilities of tapping into his "extra-dimensional" energies... a whole other universe, see if it can be travelled to, see what else lies in there... it could be that he is the god of that universe, a mindless entity, dormant within its own universe but active and conscious (though ignorant of its true original universe) in a whole other univers (MU 616).