During my smoke-free stints I found that my anxiety and depression lowered dramatically. One of my main anxiety symptoms is dizziness, and smoking causes me to feel just that, feel faint and just "not quite here". I'm fine when I wake up in the morning but as soon as I light up BAM, I need to sit down for a while. I drag myself throughout the rest of the day in a semi-fog.
Also, within 2 days of quitting, I find that my energy, self confidence and motivation goes through the roof. I feel really at ease. Hmm... I should really work on quitting permanently.
M