I have had 5 vaccines (last one in October last year). Health care worker, so not in a vulnerable category.
I do not regret getting the vaccine at all. I saw what covid did to people at the beginning, and it was not just the elderly/alreasy unwell people who became seriously ill.
Every single medicine or vaccine has side effects in some people. Medicine is always risk based - you weigh up the risks of the medicine relieving or curing your symptoms agains the risk of an adverse effect. When administering a medicine (vaccine) to billions of people, it only stands to reason that a small proportion of those people will have side effects.
Having seen what I saw, I weighed up the risks of having the vaccine against the risks of contracting covid itself. I chose the vaccine. And if it’s offered again to me this winter, I will choose to take the vaccine again.