I second the travelling part, along with willingness to eat in dive-ish places where Hep A may be endemic. Hep A is not a required vaccine, but one that I felt that we should all get before doing a lot of travelling, because it is really bad. My best friend had it in HS, and her whole family, from a restaurant.
We chose some vax due to where we were travelling, and if there was an outbreak of anything at the time we were going there. For example, I got measles as a monovalent (stand-alone) for her because France was having a serious outbreak when we were going over, specifically in the area we were staying. I think there's a great opportunity to pick and choose, based on your own comfort with risk factors in your personal life and community, etc.
And I second the way adult vaccinations can make you appreciate the risks - before I went to Egypt and had to "catch up" on mine, I also felt really bad for about two weeks afterwards. MMR has had a very horrible -though not long lasting - effect on me, and most doctors agree with my decision to not vax my daughter with it.