I turned into a werewolf in my dining room in front of Ogol the other day, and he started attacking me. This surprised me, as I've turned into a werewolf and a vampire lord in front of my Markarth housecarl on many occasions, and he still greets me with a friendly "Honored to see you again, my Thane" no matter how freakish I look.
I have found that Ogol doesn't mind what I look like if I have him following me at the time, but it's kind of a pain if I don't realize he's in the room with me...
(This is in Cheats/Hints/Spoilers because of the inevitable question of why I bother turning into a vampire lord or wolf in my home at all. The answer: I'm using the glitch that makes it possible to have both of those powers, and changing between forms affects your appearance and available abilities. I prefer to do that in the privacy of my own home.)