There's really no point to have a negative mindset. You shouldn't be negative at all. You don't have to be happy, but have a mindset other than being negative. Whatever mindset you choose, you become emotionally. So why would you want to become a negative person? There are better mindsets to have. Also, no matter what mindset you have, reality's still going to be the same reality; it's just that your perspective warps reality, and your perspective is all that matters, because your perspective is what life is through your own eyes. So might as well have a perspective that's in line with your interests. Just my two cents.