Very often. When I meet someone for the first time, I almost always like or dislike them immediately for no fathomable reason. More often than not, that like or dislike turns out to be justifiable - the people I immediately like tend to turn out to be good, reliable, trustworthy people; those I dislike tend to be the opposite.
When I first saw Trump on TV, promoting his (ghost written) biok "The Art of The Deal", I immediately disliked him without knowing why at the time.
I fidn my intuition about people is usually pretty good. Every time I ignored my intuitive feeling about a person, Ihave regretted it, as the personlater screwed me over in one way or another.
I think our instincts or immediate likes and dislikes evolved to help us better survive our fellow humans. When I listn to my instincts, I do much better than when I don't.