I have always been a Nay Sayer for most of the things. When I was young, I always used to say "Mudiyathu", " Maataen", all meaning 'NO' whenever I was asked to go on an errand, be it any thing. It was another matter I eventually did do the job, but always had this tendency of saying No. After I got married, a Sher told to me by my wife(not considered a great sher) that she learnt when she was young, seemed to aptly state my tendency and how it must have been for people who had to hear it from me. Here it is:
Nahin nahin mat karo sitamgar
Nahin nahin ka nahin hai mauka
Tere bas is nahin nahin ne
Mujhko chhoda kahin nahin ka
Needless to say, this tendency has reduced considerably.