It depends what you really mean with negative. I used to be negative in a way that I looked at things critically (including myself). I've fixed this by sort of

It depends what you really mean with negative. I used to be negative in a way that I looked at things critically (including myself). I've fixed this by sort of adjusting the way I rate things. What I previously thought was good I now consider excellent. It's easy to look at good engineering, art, jokes etc. and consider that normal and the minimum of what is good, but in fact all of that is really hard to accomplish. So if something is nothing special, that's actually still pretty ok! One way to do this is to try to accomplish something you have a vague idea of how to do, but you've never done (I don't know, design a poster) and realize it's actually maybe not that easy. This gives you an appreciation for things that maybe look like "anybody can do it", but that it's not only about having an idea, that there's also a lot of skill involved. With time, I've just started to concentrate more on the things that are good in something, that inspire me maybe in a certain way.