I didn't mean to insult others' tastes, and I'm sorry if I came across that way - I'm all for enjoying whatever palette of genres you like. But if your primary interest is character, surely you would want books written with that in mind. And if a book is primarily about its characters, why would that book be written as SF?
For me personally, if the character is unrealistic, then it bothers me. It is not that it would be primary interest, I don't read because of it. But when it is badly written it make me stop to read - it prevents immersion to me and makes me feel like that world does not "work".