Burton's Alice in Wonderland
Characters: Alice, Tarrant, Chess, Mally, Mirana
Pairings: Alice/Tarrant

Fringe
Characters: Astrid, Walter, Peter, Olivia, Lincoln, Charlie, Broyles, Nina (and any of the alt!versions)
Pairings: Meh, I'm pretty open to any het pairings

Halo
Characters: John-117, Cortana, Halsey, Johnson, Keyes (Miranda or Jacob)
Pairings: (Really, does one have to ask?) John/Cortana

Jurassic Park (movie-verse)
Characters: Ellie, Alan, Lex, Tim
Pairings: Ellie/Alan

Legend of Zelda
Characters: Link, Zelda, Navi, Ganon
Pairings: Link/Zelda

Mario Bros.
Characters: Mario, Luigi, Peach, Toad
Pairings: Mario/Peach

Monsters Inc.
Characters: Mike, Sulley, Boo
Pairings: Zip.

Phineas and Ferb
Characters: Phineas, Ferb, Isabella, Candace, alt!Candace, Jeremy, alt!Jeremy, Stacy, Perry, Dr. D
Pairings: Phineas/Isabella, Candace/Jeremy (and the alt!versions)

Primeval
Characters: Jess, Becker, Matt, Lester
Pairings: Jess/Becker

Prince of Persia
Characters: Datsan, Tamina
Pairings: Datsan/Tamina

Stargate: Atlantis
Characters: John, Teyla, Ronon, Rodney, Carson, Elizabeth, Lorne, Zelenka
Pairings: Rodney/Elizabeth, John/Teyla, Teyla/Lorne, Teyla/Carson

Speed
Characters: Jack, Annie
Pairings: Jack/Annie

Star Trek: TNG
Characters: Any of the magnificent seven, Q, Nurse Ogawa, Barclay
Pairings: Beverly/Jean-Luc

Tangled
Characters: Rapunzel, Eugene, Maximus, Pascal, Hookhand
Pairings: Rapunzel/Eugene