I've sucked my thumb all my life and have the results of it also. Buck teeth, narrow upper jaw, open bite, callous, etc. I can almost put my thumb in with my mouth closed. Other than this it hasn't affected my life at all since I do it when alone, or in front of my wife who doesn't care and, actually, totally accepts it. I'm not into adult babyism or anything like that; it's just a habit of mine that I find very good for relaxing, sleeping, concentrating and more. The only "dent" occurred when I had to go to a CPAP machine for my sleep apnea. So, along with the nasal style I've taken to use a pacifier which stays in my formed mouth easily through the night.
I only wish that it was totally acceptable, socially. Oh well.