What do you complain about the most?
To complain is human nature and I am no exception to it.
The fact is that the more you grow you tend to complain. I remember when I was young I hardly complained. We were happy with whatever we had. As children we were satisfied, content and hence there were no complaints.
Once we begin to grow the tendency to complain also grows. Your requirements begin to mount and so do the complaints.
This will go on till the time we accept what we have, feel grateful for the several bounties we have been conferred with and feel satisfied with what we have achieved.
I am trying to be grateful rather than complain all the time. But I still have a long way to go.