This reminds me of when I played fallout 3, I didn't wear any power armor or stuff like that at all. Instead, the whole time, I was wearing A pre-war business suit, and pretty much the entire outfit that dude had when he wanted to
Spoiler blow up megaton

The game ended up being a bit harder but it was worth it

I also did this.
I roleplay a Ra'Gadan Sword singer on one of my games, he's badass. Literally played through the entire game with nothing more than alik'r garb and hood with a single summoned blade (which is standing in for the sword singing for roleplaying purposes) http://i190.photobucket.com/albums/z10/leecarey_2007/ICON0-1.jpg. He actually cuts a swathe through enemies so easily that even on expert mode the game is still hardly challenging aside from the odd dragon encounter (even giants pose little threat). I have no Idea how I get by so easily on this character at high difficulties but a heavily armoured sword/shield character struggles to stay alive. I'm certain that Alik'r Garbs and hoods have hidden stats of badassery the levels of which the mortal mind cannot conceive.
However, I feel wierd not using a shield/secondary weapon/back up spell on any character (unless using two handed weapons) but it didnt feel right using a second sword/shield with the sword singer RP build, so I tend to burn peoples faces with a trusty torch as a minor distraction to gain the edge in battle. Its so viable i'd willingly dual wield torches if i could.
I am going so off topic you wouldn't believe.
EDIT: The screenshot is a PS3 screenshot that I enlarged using a PS plugin, so the quality isn't superb but it's sufficient.