Light armor only (when I use armor). Heavy armor can look pretty cool but every time I look at the heavy suits I think of how uncomfortable it must be. Heavy, clunky, hot and uncomfortable.

I use whatever. Depends on the character. My Orc wears a combo of hide, leather and heavy. Topless furs, leather bracers, hide boots and a horned iron helmet gives him his serious face.

Comes to perks, I love light armor's 50% boost to stamina regen. I'm a stamina junkie.

What I would really, really like though is unarmored furs. Let them start out with no armor rating, only to receive one if you chose to improve them at a work table. I'd love to have Michi in furs, but I don't want the armor. She's not a warrior and I don't want guards commenting on her choice of "armor."

Heavy Armor looks better and has more protection

Same here. Heavy is only used on pure warriors, though. And I don't play many of those.

I like more of the heavy armors than I do of the light ones, so I tend to go heavy. Sometimes I go with lightly armored characters though, and it is a nice change of pace at lower levels.