Help your potential matches find common interests.
If this is "of all time," I'd have a hard time deciding, so I'm
just answering this with recent materials/interests and things that
I'll always love:
Books: S., The Expanse trilogy, most of Terry Pratchett's works,
The House of Leaves, The Princess Bride, a good magazine piece,
Neverwhere, most of Lovecraft's scary stuff.
Movies: Man of Steel, Joss Whedon's Much Ado About Nothing, Aliens,
The Cabin in the Woods, There Will be Blood, Pontypool,
Shows: Firefly, Dr. Who, Nova, The X-Files, Millennium, Clone High,
Music: A little bit of everything, but not a lot of anything.
Recently, I'm on a kick where I really like music with a vaudeville
sound to it, and I'm always into music that turns my nights into a
film noir. So it can go back and forth between Gogol Bordello and
Amanda Palmer, and dark jazz.
Food: I'll try anything once, especially if it's spicy. The one
food that I really hate, though, is flan. Gag.