Live longer
More money
Breathe more easily -
Taste better - Your sense of taste should begin to improve in a couple of days
Smell better - Not only your sense of smell will return, but you will cease to smell like a smoker.
Increased libido
Better social life. No more nipping out the back at coffee breaks for a quick drag. Spend time with your work colleagues during breaks, and spend time with your non smoking friends
https://www.spacetobreathe.org.uk/content/smoking-facts
https://www.dosomething.org/us/facts/11-facts-about-smoking