I can't bring myself to like the whole character. On one hand, he actually showed some personality in MoP with his love affair with Wrathion. On the other, I can get behind his ideals. But when they try so desperately to make him go on, and on, and on about them and never really change anything, he just starts to get annoying. 4/10.
I nominate Mannoroth, also come on at least 1 person vote for Ragnaros.