I played a Khajiit assassin (oh, Di Fiesco, you charming scoundrel) all through Oblivion, and planned to do it again in Skyrim. But I'm one of the few people who really liked the new magic system in Skyrim and went with that instead.
So, my main is a Khajiit Warlock-thing, with heavy armour, with a sword in one hand and some spells in the other and a few demons in tow. It was great fun! And I've always been a bit of a professional tomb-raider in all Elder Scrolls-titles, which worked well with the theme. What half-mad demonologist wouldn't be turning old graves inside-out for magic items and to destroy the competition?
And he did become a werewolf, pretty much by accident. As if he needed more fur, although he certainly won't be feeling cold up in the mountains, at least.
I don't know how viable or how balanced and efficient my build is, and to be honest, I don't really care. It works, and I can vaporize people with one hand and slice their noggings off with the other. It's... All I ever wanted...
I should brush off the Creation Kit and give old Khan a proper evil mage laboratory, though...