General Traits:

She has a cheerful disposure!

She is very friendly and trusting of people, and meets every new face with a smile.

She'll do whatever she can to try and cheer someone up if she notices that they are feeling a bit down.

She is very talkative, and doesn't mind casually talking with random strangers about whatever.

She can be a little insistent and overbearing if the person she speaks to is reluctant and quite, feeling the need to carry the conversation forward somehow.

She easily feels lonely when there is no one to talk to or be with.

She had a hard time making friends most of her childhood, and attracted the jealousy and contempt of other fillies as she matured.

She was an early bloomer.

She can be stubborn.

She is often struck by sudden urges - if she really wants a can of her favourite refreshing soda, she'll walk several miles to get one, even if it's a scorching hot day or deep in the night.

She is a bit clumsy.

She is somewhat out of shape, but also a bit stronger than an average mare due to innate earth pony strength and having kept fit during most of her high school and college years.
But she doesn't have the endurance to run up a long flight of stairs.

Despite this, she doesn’t really mind physical activity and being outdoors.

She loves rainy warm days and thunderstorms.
She is not a fan of winters.

She was a very talented cheerleader during her term in high school and college, but hasn't retained much of the agility and finesse she once had.

She is a heavy sleeper, and occasionally takes medicines to deal with insomnia.

She wore glasses for virtually her entire childhood due to her bad eyesight, and had to wear braces for most of her late teens.
She usually wore contact lenses instead of glasses in collage.
When she got old enough she had laser eye surgery to restore her sight.

She has a great sense of direction.

She is quite smart, and learns new things very quickly.

She graduated from Manehattan Earth Pony Robotics Engineering Programming University (MEPREP) with the highest honors, qualifying her as a proficient robotics engineer. A line of work she describes as "incredibly boring and one of the biggest mistakes of my life".

She has a love for food, and eats quite often.

She is a good cook, and enjoys fine quality meals.
But she'll feel sad or get in a bad moon if she burns her food, or has to eat crappy simple meals, like plain pasta.

She loves being treated to romantic dinners.
Even just sharing a meal with her friends or partner means a lot to her.

She is a frequent drinker, and will pretty much drink herself unconscious unless someone stops her and takes her home.

She has severed ties with, and doesn't like to talk about her parents, going as far as to deny and kind of relation with them if someone "mistakes" her as their daughter.

Her mane and tail are naturally messy, with bits of mane growing in swirls while others grow straight. This makes her selection of possible working manestyles quite limited.

She sometimes wares her mane in a ponytail, or pigtails, and prefers to keep her mane at a medium-short length.

Preferences:

Her favourite colors are magenta and black.

She is ambidextrous, and can write with both hands.

She likes ribbons and socks, and compliments her outfit with a pair of stockings whenever she feels it's appropriate.

She tends to sleep in her underwear, while wearing an oversized T-shirt.
She sometimes wears short socks or even thigh highs if she feels cold at night.

Her favourite treat is Cherry Cola, an unpopular drink that virtually everyone she knows considers absolutely disgusting.

She tried smoking, but didn't get into it because of the smell and taste.

Caffeine makes her feel tired.

She likes cats, but would never want one as a pet. Or any pet for that matter.

She has a few hobbies, light reading and doodling at best, and prefers to be outside in the sunlight where she can meet interesting people.

She doesn't watch TV much, and finds the news to be depressing.

She has some interest in watching pegasus flying and earth pony racing sports, being fascinated by the flying abilities of the former, and the speed and thrill of the later.

She has a very traditional earth pony beliefs, and attributes most major advancements in modern technology to earth pony scientists and engineering, arguing that earth pony inferiority (referring to lack of wings and magic) encouraged strong competition and ingenuity in dealing with problems unicorns and pegasi never had to begin with.

She doesn't understand her cutie mark at all, and doesn't like what it looks like. She knows what it represents and its effect, but not the context of which she got it.

She doesn't usually wear a lot of makeup, but she is quite fond of black eyeshadow.

She likes to wear skirts, dresses and turtleneck sweater and vest a lot.

She is not a fan of hats and thick headgear in general.

She doesn't like videogames, or the internet, and doesn’t understand why people feel such a need to carry out acts of violence and hate either.