I'll admit when i'm really up there with alcohol i'll smoke but i'd never EVER smoke as a habit. I may smoke a few cigs on a party night, but if i'm out with friends and they wipe out some cigs, i'd refuse. I don't like smoking it doesn't really do anything for you.
I however did have my phase of cig smoking already I smoked cigs daily and steadly for about 6 months then went cold turkey.
Main Rig: I7 920 CPU, 6 Gigs ram 5870 GPU
M17X Laptop 2.8 Ghz Dual Core, 4870 Radeon