Well I love light armor. I wish there were awesome Leather armors to create with the smithing skill, but I'm not one for the Dwarven/Elven (which ever one is light. I get these two confused) armors. So right now I'm using the Nightingale set.
I really liked the "horned scale" armour pieces I found. I never got a complete set of it, but the helm and the chest piece combined with "normal" scale armour boots and bracers looked really good. Went well with my Khajiit.

For the more unique stuff, nightgale armour, but I think most people really do love, so it's "mainsteam".

Yes the Nightingale set is "mainstream" which svcks, but those of us who like to be thieves/stealthy find this set extremely helpful. I wish, like I stated above, that there were better leather armors to smith together :[