Die.

Of course, playing a board game with specific rules and dice may be personal preference, but here are six potential benefits of playing the goose board game with a die showing a 6 on each side:

1. More Excitement and Surprise: Since the probability of rolling a 6 is higher, the game can become more exciting as the players have less ability to predict what will happen next.
2. Faster Gameplay: A die with six sixes can lead to faster gameplay because the players can progress faster and the game can be completed faster.
3. Less chance of stagnation: If the game gets stuck due to several turns going by without anything happening, a die with only sixes can get the game moving again.
4. Less Frustration: If a player feels like he or she is not throwing well or is unlucky with the die, a sixes die can help the player get less frustrated.
5. Easier for Younger Players: For younger players who are new to counting pips on a die, it may be easier to play with a die that only shows sixes.
6. More Chances to Win: If the goal of the game is to reach the finish line first, players who play a 6-only die have more chances to advance and win the game because they roll sixes more often.

While playing the goose board with a die showing only sixes can have advantages, there are also some disadvantages:

1. Less variation: With a die showing only sixes, there is less variation in the game. This can mean that the game can become repetitive or boring over time.
2. Less Strategy: Using a die with only sixes can result in less strategy involved in the game. Players can think less about their moves and how to make the best use of their turn.
3. Potentially unfair to some players: If the game has a competitive element and the goal is to win, playing with a die that shows only sixes can put some players at a disadvantage. For example, if a player is already well ahead, throwing sixes more often will work to his or her advantage and it may be more difficult for other players to catch up.

In short, playing the goose board with a die showing only sixes can have some drawbacks, including less variety and strategy in the game and possibly unfairness for some players. However, it can still be a fun and exciting way to spend time together and enjoy a classic board game.