I prefer Madonna's 'Something to Remember' album, more a collection of ballads. And that voice! She carries more emotion in a single note than a whole songful of Mariah Carey's up-and-down warbling.
A couple of you include Third World's '96 Degrees in the Shade, not heard that but I'll put it on my Christmas list-I have 'Journey To Addis' on vinyl and love it.
Kate Bush 'Aerial' is another favourite, and her recent live one 'Before the Dawn'. Most live albums are little more than a souvenir, but they really made an effort with this one.
Also like a bit of Deadmau5, Prodigy 'Always Outnumbered' (not anyone else's favourite I know), The Orb's 'Ultraworld' album (good for clearing snow off the roof), and Orbital 'In Sides' for special occasions.
Oh and Frank Zappa's 'Hot Rats' for when it's time for your visitors to leave.