I got all the standard childhood ones, plus tetanus at one stage, was very proud of myself for completely avoiding the compulsory rubella one in high school. I grew up though. So when my family procreated I got the rubella shot I missed, got boosters for everything else, also got tetanus done again because one of my rats mangled my finger. I've had several flu shots, those things always made me feel like crap the day after. I got Gardasil, which was a set of three shots. Hurt like a bitch the first two times, couldn't lift my arm for a week afterwards. Got a different doctor for the final shot who made a snooty comment re: my usual doctor's poor injection technique, and this doctor must have known what she was doing because the third shot didn't hurt at all.
All up? I'd say I'd be well into the twenties, maybe even thirty odd vaccinations all up. Apart from arm soreness and the flu shots making me feel a bit crappy the day after, the only major reaction I've had was to the measles vaccine.