pet peeves

I'm perpetually indecisive, and then I hear it from another person's mouth and it just peeves me and I swear to rid myself of this habit. 

'I don't mind', 'anything', 'whatever', only to find out later that it is exactly the opposite to whatever it was said earlier. The worst is 'everything'. For e.g. I eat everything, and only to find out later that there are categories of food that are not eaten. Why didn't you say earlier then? 

So next time, be as specific as possible, it saves a whole load of time and energy.