Most counters will agree, the fewer players the better due to the game play speed, time is money after all. If I'm just counting, I personally prefer two other spots/hands to be played. This is usually the minimum allowed in most casinos I play at, so required for me to be able to wong. If I spot any other weaknesses in a game, its usually better to get the table to yourself or share with a partner. Like most, I hate playing at a full or busy tables and will avoid as much as possible.