My worst vaccine reaction has been to tetanus, every time. Last time was part of TDAP, hot red sore bump for over a week, a month before the bump was finally gone.
No, I lie, I got the rabies preventative vaccine once decades ago (not the one for when you have been bitten) and it was a doozy.
First Pfizer was nothing, second Pfizer nothing until 3 days later when I felt like I had the flu, fine the next day. By the time the booster is approved for my age group I will be ready for it (I want an 8 month gap).