In all three games, I started everything but Belial & upgraded squad and a Heavy Flamer squad (yup, found room for the Heavy Flamer).
Against the Blood Angels, I made two critical failures understanding the enemy's capability, and Lemartes & power weapon Death Company made sure the mistakes were not corrected. Against the Orks, I should have been more aggressive overall. Also, dakka jets are pretty damn good.
It was the third match against Eldar when the army started to make more sense. I deployed three columns of 5 Terminators side-by-side and marched them up the middle of the board. I used the bikers properly at last. Again, I don't think I was aggressive enough, which is a mistake I make too often. This time though, the game ended in a draw.
I'm loving Deathwing so far. They're just really simple and my turns are lightning fast. They definitely have significant weakness, but I'm having fun for now.