No caps is not as big of an issue for me. What generally turns me off against what someone writes is letter or number substitutions, or text speak. I hate "u" for you, 4 instead of for...that sort of thing. Unless you are Prince or the artist formerly known as Prince or whateverthefuck he goes by now, you are not permitted to do such things.
i am totally with you, unless it's 4EVAH! that's the only numerical substitution i don't roll my eyes at.