Seriously? :/
Of course I prefer reading something that's got proper punctuation, syntax, and all that, but I'm not going to ignore someone's post just because they didn't split it into paragraphs. Do we really need to become grammar Nazis? We're on an internet forum, not discussing word changing issues.
Yes, but I don't care about traditional paragraphs, I just like to have the gap once in a while so I can remember where I read last. (In long posts, short 3-6 liners are ok without)
I'm going to look away from the post 5 times while reading it.
I'm not going to enjoy finding where I was each time. -_-
Excpecially when there are no punctuation marks, that's when I don't even give it a chance.
Web slang is meh, I don't mind it when others use it, but I myself use proper grammer, but sometimes a slang might slip.