Favorite pairings:

Justice League

Superman/Wonder Woman

Superboy/Wonder Girl

StarGate

John Sheppard/ Teyla Emmagan

Jack O'neil/ Samantha Carter

Daniel Jackson/ Vala Mal Doran

Doctor Who

Any Doctor/River Song

Any Doctor/Romana

Jack Harkness/ Jenny (Doctor's Daughter)

Amy Pond/ Rory Pond Williams

Dresden Files

Harry Blackstone Copperfield Dresden/ Karrin Murphy

Halo

117/Cortana

Smallville

Clark Kent/ Lex Luthor- in which one of them is the opposite gender

Clark Kent/ Chloe Sullivan

Clark Kent/ Wonder Woman

Star Trek: Enterprise

Jonathan Archer/ T'Pol

Crossover Favorites

Most any story with Clark Kent/ Buffy Summers(Vampire Slayer)

Halo/Battlestar Galactica

StarGate sci-fi crossovers in which both sides are at canon or future standards.

Nearly any Babylon 5 crossovers.

Doctor Who crossovers in which the Doctor is portrayed like an actual episode or played in like it was canon.

-Nunquam Lamiae Morde "Me Ictus" – Never Say "Bite Me" To A Vampire.

-Trespassers will be shot! Violators will be shot! Survivors will be shot, again!

-"You, you, and you...Panic. the rest of you, come with me...!"

-"Light thinks it travels faster than anything but it is wrong. No matter how fast light
travels, it finds the darkness has always got there first, and is waiting for it."
- Terry Pratchett

-"I must admit, you brought religion into my life. I never believed in hell until I
met you."