I resurected this thread 'cause I wasn't up to coming around when you posted it, but I've been very introspective at my behaviors changing.
The most simple effect I started noticing is less of a roller-coaster ride. Not the real big kind, but more the kiddie kind, but still 'flatter' nonetheless.
I think I have a bit better concentration, continuity in what I'm thinking on as well.
But on the down side, the things I used to enjoy mostly leave me flat. Teevee, my big Hi-Fi hobby, they agitate me and so I just go another direction.
I think there are some very subtle effects both physiologically and psychologically that we nurse ourselves into gracefully when we start smoking and all of a sudden decades later realize that is part of who we 'are.'.
As for me, I had to give up sugar in september after 30 years as a 'Pepsiholic' and that got me with a left punch, and now the nicotine gave me a right to the chin, I've about lost interest in coffee (gasp!)....and I almost wonder who I've been most of my adult life, and if it was me, or the chemical roller coaster I rode....
SO, short answer is 'yes'.
But isn't life fun that it *can* change!