I think the most complex board game I've really played any amount of is Carcasonne (Not particularly complicated). Often, if I'm playing a board game, I prefer it to be on the simpler end, more of a relaxing thing.
One memorable board gaming experience I had was playing Splendor (I believe) with my cousin, and it ended up being almost completely silent, just passing tokens around and the occasional "oh..." when another player did something undesirable.
Pit is also popular in my family when there's a gathering of us, with rounds often lasting only a minute or so, and getting quite frantic, and it is a very simple game
One memorable board gaming experience I had was playing Splendor (I believe) with my cousin, and it ended up being almost completely silent, just passing tokens around and the occasional "oh..." when another player did something undesirable.
Pit is also popular in my family when there's a gathering of us, with rounds often lasting only a minute or so, and getting quite frantic, and it is a very simple game