This is one of those "30 day" memes but I'm too lazy to do that, so I'm doing this meme all at once.
Day 1 - Favourite Straight Pairing
Byakuya/Yoruichi, oooh, big surprise.
Day 2 - Favourite slash pairing
If we're talking characters who are gay in canon, then Haruka and Michiru from Sailor Moon.
Day 3 - Favourite sapphic/femmeslash pairing
Same as above. I'm not that familiar with other shows that have canon gay couples in it.
Day 4 - Favourite siblings
Ed and Al from FMA. They're too perfect.
Day 5 - Favourite friendships
Saria and Link from Zelda: Oot.
Urahara and Yoruichi from Bleach.
Orihime and Tatsuki from Bleach.
/too many to count.
Day 6 - Favourite parent-child relationships
This is tough, but I'll have to say Ichigo and his mother. The second choice would be Ed and Al's mother.
Day 7 - Favourite rivals
For lolz, I think Tatsuki and Chizuru from Bleach, though it's not technically a rivalry because they're friends.
For seriousness, Link and Ganondorf/Ganondorf's various incarnations. I mean, these two get reincarnated over and over and they've been mortal enemies each time. You can't beat that. (At least Link has been reincarnated, it's suggested Ganondorf/his various incarnations are all the same person).
Day 8 - Favourite partners-in-crime
Urahara and Yoruichi, hands down. They make such awesome partners, whether or not you interpret their relationship as romantic.
Day 9 - Favourite family unit (four or more people)
Kenshin and co. from Rurouni Kenshin has always been my favorite.
Day 10 - Least favorite pairing
There are too many for me to name, and I've answered this about a bazillion times already anyway.
Day 11 - An "OT3" or threesome
Meh, don't have any, it's not my cup of tea.
Day 12 - Favourite Person and Animal Companion Relationship
Usagi and Luna from Sailor Moon.
Day 13 - Your first pairing
Link/Zelda from Ocarina of Time.
Day 14 - Your most recent pairing
Ghirahim/Zelda from Skyward Sword.
Day 15 - Favourite non-canon pairing
ALL of my pairings are non-canon except Byakuya and Hisana, and I guess Gin/Rangiku.
Day 16 - Pairing with the best chemistry
Don't make me choose, I can't. I guess if you're looking for "healthy" chemistry, it'd be Byakuya and Yoruichi, because the chemistry Ghirahim and Zelda (would) have is all kinds of screwy.
Day 17 - Favourite canon pairing
I'm torn between Byakuya/Hisana and Kenshin/Kaoru, because ByaHisa caters to my love for dark and angsty pairings, but Kenshin/Kaoru caters to my love for cuter ones.
Day 18 - Favourite group of friends (four or more people)
As much as I'd love to say Ichigo and his nakama, they fall into the Shonen cliche of friends. So I'll say Kenshin and co, which still has some shonen cliches, but considerably fewer of them.
Day 19 - Favorite band of villains
The Juppon Gatana from RK. The villains actually repent (or, most of them). I'm not a big fan of the Espadas because they're all pretty much the same "badass band of villains" that you see all the time in shonen.
Day 20 - A pairing you like, but don't like what canon did/is doing with them
I can't really say, because almost all of my pairings are so non-canon, canon is literally doing nothing to them. For each person maybe, but not as a whole. In which case, Bleach. Kubo, you break my heart.
Day 21 - A pairing you think gets too little attention
All of my pairings. No exaggeration. But I think Ghirahim/Zelda is the top, because I've literally met only two other GhiraZel fans on the entirety of the internet. Everyone else is crazy over GhiraLink or DemiGhira or for fuck's sake, GhiraDemiLink.
Day 22 - A pairing that a lot of people ship, but you don’t
GhiraLink is so crazily popular I've often compared it to a worldwide epidemic.
Day 23 - An unpopular pairing that you like
Again, all of my pairings. Except maybe GinRan and ByaHisa, while they're not AS popular in Bleach, I wouldn't call them unpopular.
Day 24 - A pairing you think are actually together behind-the-scenes, but it's not confirmed in canon
Ghirahim and Fi I mean oh my god how could you not? They are literally the embodiments of each opposite scale. Fi is a purely benevolent being while Ghirahim is a purely malevolent one. They're literally the only two beings of their kind. Even their character designs complement each other, for fuck's sake. And yet everyone I talk to goes "Nuuu! Ghirahim only likes Link!"
Day 25 - A pairing that you have grown to like but didn't at first
I can't really say. If I dislike a pairing, next to nothing changes my mind.
Day 26 - Favourite childhood pairing
Again, Link/Zelda from Oot.
Day 27 - Pairing you think is the most adorable
I don't really like adorable pairings, but I guess Ichigo/Orihime is adorable enough.
Day 28 - A pairing people would be surprised you like
Probably Haruka/Michiru, as most people have the incorrect assumption that I'm "against" gay pairings, when the opposite is true: I'm for gay pairings as long as the characters are ACTUALLY gay, and none of this "well it's up to interpretation, you can't prove they're straight!" nonsense. If you can't prove they're gay, then they can also be straight, or any other sexuality, so what's the point?
Day 29 - Your favourite of all the relationships you've posted so far
I CAN'T CHOOSE. DON'T MAKE ME CHOOSE :(
Day 30 - Free choice!
Buh I have no idea.