You said:
All motivations, including altruism are selfish motivations. People wouldn't be altruistic if it didn't make them feel good or satisfy some other need of theirs.
That is, you claimed that the only motivations are
feeling good or
satisyfing some other need - ie self-regarding motivations.
Now you have added to that list
something the person likes to do.
A counter-example would be any action that is not motivated by feeling good, nor satisfying some other need, and that isn't something the person likes to do.
Some candidates would include voting at elections, a parent changing a baby's dirty nappy, tithing, visiting an old friend or family member whom one doesn't particularly care for, etc.
Of course, you may argue that all voters
really like to do it; that parents are satisfying some sort of procreative need; that all religious people feel good as a result of paying their tithes; that people who visit friends or family out of duty feel good about it; etc - but those are precisely the psychological claims that are (as I said) contentious.