Back in the day, we're talking all the way back to the 90s and prior, the case of beer was the definitive unit of measurement for starting a good time.
There's no one single choice when it comes to choosing the best beer to mix with your batter-making ingredients - egg, flour, and (optional) spice. Choose a beer that matches the spirit of the meal that you are looking to cook. That's what it is most important.
Shower beers aren't just for pre-gaming college kids and dude bros. Naw, the truth is that showering with a beer has existed for a long, long time.