The Orcs found Krag and Arghat to be the most appealing; Garun wasn't fully tested, but potentially, he's a very strong hero. Goshak and Shaq didn't make much of an impression; Gosh is a very ordinary specialist, and Shaq is clearly not for everyone, and the dubious bonus of +2 for level 6 is questionable. Haggeesh is for beginners and those who prefer a simpler approach. Tilshek is a potential "machinist," also for those who want something easier and faster. I haven't played with Keegan at all; I can't understand how his ability can really help if there's a good alternative.