I had a tonsillectomy when I was 4; gallbladder removal when I was 18; draining my lungs, thymus biopsy, pericardial window (removing fluid from the sac around my heart), and port-a-cath insertion when I was 19; and a bone marrow biopsy and port-a-cath removal when I was 20. So eight altogether.
My favorite anesthetic was when they did the thymus biopsy--I was awake during it but I didn't care about anything, haha. I swear, they could have been about to chop my head off and I'd have been all, "Oh look, there's an axe, I wonder what they're going to d--"