I hate the whole concept of creating characters, and hate those checklists even more. Why "create" a character that's put together like Frankenstein's monster, with this part to please one person, that part to please another, while leaving out a part someone doesn't like, when there are six billion real people in the world to choose from?
. . .
If you have to build characters, build them from real people you've known, not from checklists.
I might counter that I don't know any 18 y/o male hookers, or incredibly handsome psychopaths, or suicidal college professors. I don't know people like that. I made them up. Not with a written check-list in mind, but just the same, I made up those people.
Just not in a vacuum.
. . .I write FANTASY novels. The novel I am currently writing has a demon in it. Do you know any demons Mr Ritchie, because I've never met any. I suppose I could summon Satan, and interview him, but that sounds a like a very bad idea. And I'm not about to write people I don't like into a novel as demons. That's just plain wrong.
I might counter that if (for example) the character thinks, feels, emotes, acts, communicates, then that character is more familiar to the author than perhaps she knows.
Presumably.
Some writers want to solidify in their own minds who their characters are before they write their stories. Some writers trust that their stories will shape their characters.
Regardless, nobody writes in a vacuum. Every character we write comes from somewhere. Our experiences, relationships, memories, casual encounters, creativity, all of that has some bearing on our stories, whether we're aware of it or not.
That's what I think, anyway.