My OTPS

Supernatural: Dean/Castiel (Sam/Sarah)
Friends: Ross/Rachel
Harry Potter: Ron/Hermione
Superman-Smallville: Lois/Clark
Gilmore Girls: Luke/Lorelai; Rory/Jess
Ally Mc Beal: Ally/Larry
Dark Angel: Max/Alec
Veronica Mars: Veronica/Logan
Beverly Hills 90210: Donna/David
Dawson’s Creek: Pacey/Joey
Mary Poppins: Mary Poppins/Bert
Pride & Prejudice: Elizabeth/Darcy
Queer as Folk: Michael/Ben
Brothers & Sisters: Scott/Kevin
Arthurian Legends: Gawain/me XD (seriously, no OTPs here… though I find the Arthur/Guinevere/Lancelot triangle really interesting)
Castle: Beckett/Castle
White Collar: Neal/Alex
The Lord of the Rings: Eowyn/Faramir
Firefly: Zoe/Wash
Fringe: Peter/Olivia
Doctor Who: Ten/Rose
Suits: Harvey/Donna
Downton Abbey: Mary/Matthew