Such an easy one. So easy, in fact, that it doesn't even give me any satisfaction to post it. I'm going to be predictable as well and repeat
erychan86 's choice for this category - and since neither Chiara nor Mark have posted yet, who's to say they're not going to choose the same couple as well? After all, we all pretty much had a similar feeling about them.
Also, stealing answers from Ery allows me to use her graphics and saves me a lot of time Googling images :D
Sawyer/Juliet (Lost)
This is quite a recent ship and I can say I remember the first hints of it came up in the promo for season 5. And I seem to remember that at the time we were all (with the possible exception of Mark who was superexcited about it even then) "what are they trying to do? they're not seriously trying to put those two together are they?".
A few of my friends shipped Juliet/Jack, for no other reason that they liked Juliet, so really, they just wanted to see her happy. Of course the definition of happy shifted when we got to see Dharmaville 1977. They're absolutely adorable and it's not just that they worked - it was really also easy for all the viewers I know to get used to the idea of them as a couple, because it made sense. Start afresh: new people, new jobs, new relationship - a second chance at life. Of course it had to end tragically - one of us (who exactly? I don't remember) wrote recently that Juliet had "tragic death" written all over her character right from the very beginning, and it's kinda true.
Also, personally I loathe what they have done with the flash-sideways, and I wish they'd gone with my interpretation of things (bigheaded much? :P) rather than that stupid religious bullshit, BUT - the scene of them reuniting at the vending machine in the finale was definitely worth sitting through all the stupid stuff.
Day 01 - What is your current favourite ship?
Chuck/Sarah Day 02 - What was your very first ship?
Tommy/Kimberly Day 03 - A pairing that needs to happen now?
Grissom/Sara Day 04 - The pairing with the most chemistry?
Xena/Gabrielle Day 05 - The pairing with the least chemistry?
Shannon/Sayid Day 06 - The best kiss?
Sydney/Vaughn Day 07 - The most heartbreaking scene?
Naomi/Emily Day 08 - The pairing with the most baggage?
Doug/Carol Day 09 - The most believable relationship?
Chandler/MonicaDay 10 - Why aren't these two married in real life?
Zach Levi/Yvonne StrahovskiDay 11 - What is your dream pairing?
Liz Lemon/Jenna MaroneyDay 12 - Who had the best wedding?
Phoebe/Mike Day 13 - What is your favorite television/movie pairing?
Christian/Satine Day 14 - What is your favorite book pairing?
Dar/Kerry Day 15 - What is your favorite real life pairing?
Mark/Ery Day 16 - What is the absolute worst pairing?
Will/Emma Day 17 - A pairing you thought would never work out, but did?
Day 18 - What is the cutest pairing?
Day 19 - A pairing you've rooted for since the beginning?
Day 20 - The "can't stand the sexual tension anymore" pairing?
Day 21 - A pairing you like and no one else understands why?
Day 22 - A pairing you hate and no one else understands why?
Day 23 - A crazy love triangle/quadrilateral that worked out great?
Day 24 - A crazy love triangle/quadrilateral that worked out badly?
Day 25 - A pairing that was/would-be adorable, but could never work out?
Day 26 - A pairing that you hated and ended up loving?
Day 27 - A pairing that you loved and ended up hating?
Day 28 - A pairing that you will never understand?
Day 29 - What ship had the best proposal?
Day 30 - Your favorite ship forever and ever and ever?