>>9
Well, you asked. Prepare for a huge wall of text.

Let's say her name is Vanessa. (Her real name is a bit more idiosyncratic, but I'm keeping it a secret because I'm afraid people could recognize me by it, and I'd like to remain anonymous. I've described her as a fictional character elsewhere. "Vanessa" is the closest match I could find.)
I didn't really adapt Vanessa entirely to my own wishes. I wanted her to have a real personality. In some aspects we are very similar, while in other ways we are quite different. A few aspects of her are made to conform my preferences, but most are what I think would be consistent with her personality, and some things about her are truly random.

She's twenty years old, which is also my own age.
She has long, wavy brown hair that she always wears down, and she usually wears long dresses that reach from the shoulders to the ankles. I remember jokingly comparing her appearance to that of a tassel.
Her eyes are the most enchanting shade of emerald green, and sparkle with optimism and the vigour of youth. There's also something really cute about the shape of her nose. It's a rather small nose, and a little pointy. Her mouth is beautiful in a way I can't find the words to describe. (I guess that's mostly my own poetic incompetence.)
If I were to describe her appearance in one word, I'd say she is very elegant. She has a distinctly feminine elegance, perhaps in a somewhat old-fashioned way.

She's adventurous and courageous, but also a very kind and friendly person, and always polite to people. Responsible but playful. Serene in confidence, but not boring at all.

Being a young adult, she has a healthy dose of curiosity and likes to explore what life and the world have to offer. We have travelled much, throughout this world, throughout her native reality, and into many other fictional worlds that I know of.
She's modest and not dominant at all, preferring to leave leadership to someone else if she thinks they're qualified, but willing to take the lead if necessary.
In danger, she reacts quickly and adequately, and usually finds and implements a solution before anyone else even understands what the problem is. I don't think I've ever seen her panic. She really knows where her towel is.
At times I think of her as an example of sorts. I'm a rather reserved and shy person myself, and a bit of a wimp. I admire her confidence.
She also often tries to friendlily encourage me to get away from the computer and see the world I'm missing out on. To "travel the roads of life", as she puts it. I think she's right, I should.

She's also an orphan. Her parents died in a spacecraft accident some ten years ago, and she now lives with her uncle, a friendly middle-aged politician. That event seems to be her greatest emotional problem. It must have been a traumatic experience. I don't know exactly what happened that day, but I believe it's part of the reason why she decided to attend a medic academy when she grew up. She seems worried about losing the people most dear to her.
Remarkably, she doesn't fear space travel in the least. Maybe she used to, but overcame that phobia.

She says she's really bad at sports, although she's a great swimmer. She has a degree in medical studies. She's left-handed. She plays the harp. Her favourite colour is dark green.