> This seems to cause friction though, and maybe represents some kind of personality issue. I don't know why I'm like this or what it might mean though.
Maybe I'm biased, but if expressing your non-consent of celebrating something about you that you didn't chose causes friction, that's not your personality issue. A desire to give everyone presents even if they don't want them is the personality issue.
Receiving a present creates a social obligation to deliver a present later and may also be a conflict of interest. My spouse was an elected official (board of supervisors of a tiny government agency) and it was great because I had a concrete reason to refuse gifts; anything from not close family over a tiny threshold had a reporting obligation, and anything over a not so big threshold was prohibited; nobody wanted to participate in reporting, so no gifts.