There is nothing sweeter then passing somebody on a climb fixed or geared . I ride both but passing roadies on a climb or just riding their a$$ when you are on fixed and have them keep looking back and shifting trying to drop you makes me feel good. Maybe I am just an a$$hole but it is the little things that make me happy . On the flip side I hate being drafted (except if they are a friend) when I am on my road bike and will drop them or slow down to get the fool off of my wheel