Our own Hamst3r's Amnesia LP is one of the few I have actually watched in its entirety. Same goes for Fear Gauntlet which counts since it was never posted on GB proper. ;) Otherwise I'm an EpicNameBro and Markiplier fan. Few other channels keep pulling me back by pure host-appeal.
I'm a stickler that a LP has to be interactive with the audience. I'm not so 2002 that it still needs to be screenshots, but if it's not "Let Us" it's just not.