One side of me prefers heavy armor for looks(although Daedric and Dwemer armor in Oblivion look atrocious) and the added defense, but the other side of me can't imagine a Nord in heavy armor. Whenever I think of northern warriors I think of vikings, Conan the barbarian, and Logen Nine-fingers(awesome books imo), all of them are clad in light leather armor. I can't really say I care for Elven or Glass armor. The pros for light armors are the fact that they weight less, allowing you to carry more(although the right perks make it so armor doesn't count towards your encumbrance), the fact that Nords have +5 in light armor, and the fact that they generally cost less.
I'm assuming that Dragon armor will come in both Heavy and Light varieties, so that doesn't help me decide on one or the other. Anyone have input on the matter to help me decide? Can anyone think of prominent Nordic characters who wear heavy armor?

If it helps at all to say that I'll be playing as a Nord and I'm almost certain that I'll use heavy armor. Hope this helps.