Okay... Is this all some sort of sick joke? If not, why do they find me 'nice'?

You don't make a very flattering statement about yourself but anyways these women have sure seen something in you and quit putting yourself down. Women (inc.me) can sometimes find honesty & a guy who speaks his mind to be really nice so maybe that's what it is, after all you did say yourself you are very blunt. Have fun solving this mystery. But I bet you're secretly loving this!