The worst symptom for me is that i can't think. Ive had ADD real bad since i was a teenager, havent really had any issues since i started smoking. Starting the day after i quit i now feel like i did six years ago, my brains just in a crazy mess of confusion. My temper is definitely on the rise too, not being able to think straight is really frustrating. I chain smoke really bad though, i pretty much always have a cigg in my hand. Its nice to have somewhere to bitch about it.