Nothing annoys me more than someone I'm dating who cannot find time for me.
The truth of the matter is, you make time for not only who you want but who you genuinely care about. I say genuinely because a lot of people will say they care about you with words but with their actions show you quite the opposite.

I live in one of the busiest cities in the world, where the pace of life is constant and the flow of ones day can be pulled in a multitude of directions.
And as a result I enter any relationship or courtship with the full understanding that shit happens.
Life will not always revolve around me and my feelings and therefore I shouldn't take it personal if the guy I'm dating cancels a date or has to reschedule our plans.

And as accommodating as I've always found myself to be... Some have taken my understanding resolve as a weakness.
That's when I become annoyed.