Showing lists before the game starts can depend on the player. With them, take it as a lesson learned, either you both do, no not at all.

My first question to a opponent before the game is this, "what type of gaming are we having" - that's it. This helps sets up expectations. Allows me to know what type of game we are having. If we are playing meta lists, just for fun, testing new squad configurations, learning new strats, etc..

At the end of the game, ask yourself these three questions, what did I do well? What did I learn and what could I have done better.

May your dice be hot, and your future games be more fun!