I'd be more of a evil horror movie demonic ghost, but not one of those obvious ones that appear horrifically in mirrors, make weird sounds, appear transparent, etc. that are practically begging for exorcism. I'd be much more subtle, in fact if I could help it no one would know that they were being haunted at all. I would manipulate the feelings and dreams of people, for instance, by manipulating anger I'd turn a typical couple's argument from this:
MAN: "You keep wasting our money!"
WOMAN: "I earned it! I can do whatever I want with it!"
Until it eventually degenerated to this:
WOMAN: "You A$$H!@*&! I'LL KILL YOU!!!! *gunshot*
Which then I would manipulate the resulting sadness until I got this:
WOMAN: Oh My God... What have I done?!? I'm a horrible person! I DON'T DESERVE TO LIVE!!! (hangs herself)
Furthermore, I would manipulate any potential resident's feelings so they'd want to live in the house, and then continue once there so they wouldn't want to leave until they were dead. Afterwhich I would have their souls and that of their victims, which would strengthen me, increasing my power and extending my area of influence, and those that successfully resisted would carry my "taint" with them wherever they go, until it covered the entire planet, eventually following them into the stars. I wouldn't be until I was all powerful that I'd reveal myself as a god, manipulating (it would be my theme) people into worshipping me, further increasing my power until I was unstoppable.
Pretty horrific huh?