I'm doing Spirit from our RP for Animal Crossing. He's a racing horse... or used to be.
1: Their voice
Gruff and he's got a slight accent of a gambler from Vegas.
2: Their smile
Spirit doesn't really smile anymore. The only one who's seen him smile in this town is Kicks. It's an honest smile and you can see his younger self again.
3: Their greatest achievement
Winning the Newston Derby and creating a new record for fastest lap. He keeps the news article from that day back in his study.
4: Their insecurities
His leg/ankle always gives him trouble. He hates how people look at him like some crippled old man when he used to be a famous racer.
5: Their shortcomings
Spirit is not good with people, not even in his golden years. It was train, race, win, show off, then repeat. Anyone he was close to only saw either his serious racing side or his prideful gambling side except a certain gal.
6: How they deal with grief
Spirit has two different ways of showing it. He either doesn't show it at all and hides in his house until he runs out of groceries and has to go out or he explodes at the first person who was the unlucky one to be in the wrong place wrong time.
7: How they like to dress
Spirit likes to wear some of his old training jerseys when it's hot outside and in the winter he wears a dark trench coat with a beat up fedora.
8: What they like to eat
Wheat cakes with honey and shrimp. Wheat cakes remind him of a certain mare who would bake them for him when he lost a race and every Casino has the best shrimp at his racing track.
9: Their theme
Ummm.... I would probably pick You Can't Take Me from hehe Spririt Stallion of the Cimmaron. It gives me the feeling of his story. He feels shorted in his life and wants to fight against it. So that's what he's trying to do, but...
10: Their fashion sense
Dark colors and some lighter accents colors if he's in a flashy mood. The only really colorful clothes he has are his old racing jerseys.
11: Their family life
Spirit doesn't have any close family. He had a brother, but he went on to race in another country. He almost married Peony... but, he had his accident and shut everyone out.
12: Their romantic life
He loved Peony Trot back when he was in his prime and she loved him in return. He planned to propose after he won the Drewbury race tournament, but his accident left him ashamed and shunned. He couldn't face her being this way. He ran away and now he's all alone.
13: Their embarrassing memory from years ago
He was trying to impress Peony on a picnic of theirs, but on accident knocked a beehive down from a nearby tree and they spent the rest of the picnic in the nearby pond.
14: How they react to burning their tongue on food
He would shout and blame the cook. He's a grump.
15: How they react to a brainfreeze
His scowl would get more scrunched up than usual and he'd tap his cane against the ground til it stops.
16: Their dreams
Either his glory days as a racer or some happy memories of him and his mates or Peony.
17: Their ambitions
He wants to fully heal and win the Drewbury race tournament like he was supposed to years ago.
18: How they sleep
He sleeps on his left side keeping pressure off his right leg.
19: Their reaction to betrayal
He'd shout, stomp, and probably kick anything he could reach. He'd take his anger out on the closest thing until he can face the betrayer face to face.
20: Their reaction to a mystery love letter
In his younger years, he'd feel smug and add it to all his other fan letters unless it smelled like honey. Then he'd knew who it was. Now a days he'd crumple it up and toss it never smelling honey.
21: How they react to pain
He keeps his scowl on pretty much all day because of his chronic pain from his ankle/leg. If it's a sharp pain he'll shout and rant about it for a good long while.
22: What they're like on two hours of sleep
...you do NOT want to see that...
23: How they act when they're sick
He tries to ignore it and keep going on. Once it gets worse enough he'll just lay in bed all day grouchy and aching. Luckily, there is someone who keeps an eye out for him.
24: What motivates them
Not much now a days. I would guess his pride.
25: Why you enjoy them
Because I feel like our RP story needed a grumpy AC character, but you still want to like them in some aspects. Plus, I like having a character that can be a grouch to anybody if they want. Lets me test out different writing and dialogue styles.