Most of the major points have been hit, but I would just add that it's useful to be seen handrolling. It can be an icebreaker when you want one; it promotes the notion that just because you smoke, RJR or Philip Morris don't have to get your money; and it's usually good for a bit of friendly banter with your local law enforcement personnel, which is always good (unless you're in the process of committing a crime). Also, like putting Echelon keywords in your .sig files, it supplies a bit of camouflage; the more widely people are seen to handroll cigarettes, the less suspicious the activity will generally become.

I think Thax missed the two biggest advantages, though:

  • Handroll tobacco is not boiled in glycerin or doped with saltpeter etc. to keep them burning, as regular cigarettes are, making handrolls a lot less hazardous to your health, and
  • They taste much better.