Most people say its because your not the lord of the castle. Serana or Valerica is.
"The Castle is yours, we will aid you as you attempt to spread your influence throughout Skyrim."
Almost everyone misses this quote right here. Those that argue that someone else is lord, missed this.
It is said very... well not epic like at all. There is no ceremony, there is no sensation of power, and it's said so casually that you overlook it like, whatever. No one else comes in to congratulate you or anything.
I would want the people kneeling at my feet swearing loyalty as the room turned pitch black and the glowing eyes grew brighter....
Give me a ceremony, bring me to Molag Bal who will make me a pureblooded vampire! Something interesting. Not, "oh you're lord now, goodbye."
?
Really? I don't know what game you lot are playing but the vampires have different initial dialogue when you beat harkon well only orthjolf and the two generic vampires don't say anything new.
This is from th top of my head
When harkon is around
Vingalmo say something to the effect about respect and you are welcome here.
After Harkon death
Vingalmo:I live to serve
Fura: None can deny your power now.
Before harkon death
Vampire who handles the forge(Forgot her name):I keep the forge running day and night just in case lord harkon needs it
After harkon death
Vampire who handles the forge(Forgot her name): I keep the forge running day and night just in case you need it.
Mine must be glitched because I have none of that...