76. Who takes longer in the bathroom?
Azula.
77. Who has more songs on their ipod?
Zuko.
78. What movie did they first see together?
The movie adaptation of "Love Amongst The Dragons"
79. What do they like to see each other in?
Nothing. Azula likes seeing him in his Fire Lord attire. Zuko has a thing for seeing her using clothes that resemble her old uniform from when she was at school, and wearing nothing but her red robe (for obvious reasons)
80. Who makes jokes during inappropriate times?
Azula, because she's a little shit.
81. At what age do they discuss the possibility of children?
Probably by the time they're both officially adults.
82. What do they love about each other the most?
Azula loves how kind and loving Zuko is, while Zuko likes how passionate and hardworking she is.
83. Who is the one that sees the big picture, while the other focus's on the small details?
Depends on their mood and on the subject.
84. What would they write on their partner's social media's for their anniversary?
Zuko would make a sappy, but really cute speech about their life together, how proud he is of her, how happy she makes him everyday, and how makes him want to keep on trying to be better. Azula would write a bunch of compliments and loving phrases... in "Azula language" (an "I love his strength and ability to keep on trying even when things don't work " turns into a "I just know he could absolutely crush anyone who stood in his way. He takes what he wants by any means necessary") and that would creep people out. She'd probably finish it by finding a way to over-share, probably by meantioning how good he is in bed.
85. Who is bad at math?
Azula. "You miscalculated"
86. Who googles everything?
Zuko.
87. Who does stuff on impulse?
Usually Zuko, but Azula has her moments.
88. How do they comfort each other when they are helpless to do anything about the situation?
Lots of cuddles and emotional support.
89. What is an inside joke they have?
I'm going to steal asexuelf's answer and say they use lines from "Love Amongst The Dragons" all the time.
90. Who makes the other smile with almost no effort at all?
Both.
91. What is their favourite holiday?
Sibling day. New Years because it's just partying and getting drunk with their friends.
92. Who is the one that is calm and collected while the other is angry and destructive?
Usually Azula is calm and collected while Zuko is angry and destructive. Usually.
93. What is their favourite board game to play?
War, but nobody ever wants to play with them because, for some reason, that game makes Zuko be just as competitive as Azula, and one Azula is already too much for most cowards people to handle.
94. Who accidental sets something on fire?
Zuko. Azula burns shit intentionally.
95. Who has the car ready while the other is robbing the store?
Zuko, because he doesn't trust himself not to screw up while robbing the store.
96. What artist/group did they go to for their first concert?
The White Stripes.
97. Who sleep talks?
Azula. Zuko just laughs and snuggles her.
98. Who is the more social one?
...Neither? Zuko sort of wins on a technicality. They're both social disasters.
99. What are their karaoke songs?
They don't like karaoke unless they're drunk, and drunk Zucest sings anything.
100. Who would get up on stage and make a fool of themselves just to make the other laugh?
Zuko. He has a psychological need to make his baby sister smile.