well--you shouldnt have many problems for about the next 25 yrs other than couging and hacking and some shortness of breath. However, after age 50 there are a myriad of cancers that you could be looking at. A lot of long time smokers seem to die of throat and/or lung cancers by their late 50s.And bladder cancer is almost non-existent in non-smokers.
Good luck.