Golf is a big world. Subject to your impact on the course and other golfers, play however you enjoy the game.
We like to play fast, so I personally prefer less than a foursome in many cases. Our group has been known to split into a two and a three when an extra needs a game. On the occasions when no one else shows up, typically in bad weather, I am perfectly content with playing by myself if the other options aren't desirable.
I recently played as a marker in a USGA Fourball qualifier. The two college kids I scored for played a wonderful game, were pleasant, and very deliberate. They consulted on every shot, sometimes walked up to within a few yards of the green prior to their approaches, and read each other's putts of any length past a foot or so. But for choking like I often do down the last three holes, they would have easily qualified (they tied with three others for two alternate spots but didn't come back the next day for the play-off).
Someone at the club asked me if I enjoyed being a marker. It was interesting watching how my home course is played by such fine golfers (-7 after 13 holes), but I'd much prefer playing by my lonesome in under three hours than spending over 4:30 watching these young guys grind.