Its not normal for me no, and have no clue if its a BPD thing. My bf is a year younger than me and the only thing he has in common with my late father is being direct and a love of the ocean.

But heyyy, they say we end up marrying our parents don't they?
In my family so far, both my BIL's have similar character traits to my dad, even though they're a few years younger than my sisters, who don't have any disorders.