The one that's least interesting to my cat so that it can stay set out long enough to actually play.

Monopoly.

Carcassonne

Unfortunately, I haven’t played any of those in at least a decade.

Cluedo

I'm a bit of a board game nerd :) ... right now my favourite board game is called Pandemic. But really it depends on what worked best during the last board game night I host.

Upwords or Scrabble

Chess