You're obviously going to want conditioning in the heavy armor tree to not run out of stamina instantly (I somewhat cheated and added that at the start of the game through the console. Really can't be bothered with having to get hit a billion times to get 70 in heavy armor.)
The block tree is awesome in general with a shield and actually makes playing a warrior in this TES game equally fun as a rogue/mage. Power bash and the disarm perk is fantastic, even the tough guys lose their weapons and then you can just annihilate them, usually with a sweet finisher

