My dad died last year so nothing. But… I didn’t ever get him anything. He was of the opinion that he had a birthday and that was enough and that Father’s Day was just an excuse to sell cards.
Personally, I like receiving gifts and my kids are still kids so they get excited by proxy. I like single malt whisky so there’s always that (though obviously their mum has to get involved).
And I like to cook (come and check out https://feddit.uk/c/cooking_with_fire if you’re into barbecue of any sort!) So there’s always some little gadget or ingredient (hot sauce or something). They can get me.