I hate waiting.
I don't hate the time spent waiting. For example, if I am baking a cake that will take 1 hour, I am fine with sitting around waiting for it. Or if I have a project that needs requirement from some busy people, then I spend quite some time waiting for their answer. But the thing is, in the meantime I can do something else, whether it's productive or totally self-centered.
I don't mind the fact that my creation will be delayed as a result of waiting. Except in some extreme cases, usually the time frame is still acceptable.
I am also not bothered by the fact that I will receive a gadget later than I thought. Instant gratification was not part of my bringing, so ordering product online works for me best (no line-ups, cheaper price, no commuting time... what more can I ask for?) ^_^
But I hate the uncertainties that waiting entails. Sitting beside the phone waiting for news about a sick family member, or the result of a product launch, or a job offer... those kind of waiting fills up the time with a feeling of dreads. I really am not good with this kind of waiting...