lol, Our opinions are of extreme similarity. ^_^

There's a lot, maybe too much for me to list, that makes me like a character.
One, is originality. It's true that total originality is near to impossible these days, since so many have already come up with the ideas. There is no true originality left in the world. Someone could make a character, and sure they may have a unique design, but that design didn't come from out of nowhere. People get their ideas from other people, seeing what they've done, observing, and watching them. What I like when it comes to originality, is appearance. But I don't like ridiculously complex character designs like some I have seen on here. I rather like plain designs, simple, yet so complex in a way. Be it the artist's drawing style, or how a writer describes them in a story, etc.. I love certain personalities too. I really just love what is different among most. The individuality. It's hard to see with some characters, and with others, it's written all over them.

Among other things, I like it when a character has little quirks. More often than not, it's the little details that really flesh out a character. Whenever I write (and I do this often) I like to come up with individual behaviors that a real person might have. Rather than focus on huge backstories, I like to focus on little things in the character's past.

ex: The character once ate a mango that they didn't know was rotten. They haven't eaten a mango since.

This tells the reader that the character learns from mistakes, but sometimes is too careful. It's the sort of thing that happens in real life all the time.

When I was little, my parents read Sherlock Holmes stories to me (indeed, that's why I'm studying forensics and criminal science at college this year) and I took Holmes' ability to observe minute details to heart. Just like in Sir Arthur Conan Doyle's masterpieces, it's the little details that matter the most.

I love when a player can have a character who's beliefs or personality is different from their own and yet play them believably, without making the character do things that are against that characters convictions. I also love unusual characters, ones that are very normal maybe not in physical appearance or shape but they respond in a 'real' way with a mind of their own. I'd rather read about a character who struggled realistically with a problem than one who had an epic adventure and was never fazed.

Originality coupled with a well-rounded personality. Or a slightly off-kilter personality that makes them unique.