Just bottled our last two batches this past week.
First brew was a Russian Imperial Stout.
Then, Imperial Blonde Ale - this is the best one yet. Definitely a keeper for the fridge.
Honey wheat
A Belgian Saison.
Have a Daredevil IPA - in a one gallon fermenting.
Have a Irish Red to brew, but what is the one beer that everyone should brew, just once?
The easy answer is of course "brew whatever you want", probably straight from
Joy of Homebrewing, but for the sake of actually answering the question.
Rather than one classic style that everyone should make like a pale ale or a stout, I'm going to flip the question on it's side a little and focus on the "just once" caveat.
I think, just once, everyone should brew something "weird". Something non-traditional (by North American/European standards). A beer from Asia, Africa, South America. A beer that uses an alternate sugar like honey, molasses, sorghum etc. A beer that uses fruit or spices. Go wild. That's the beauty of small batches, you can be really creative. It might turn out great, it might turn out awful. You might love it, you might hate it, but I guarantee you'll learn something. Next time you want to use honey or grapefruit in a beer, maybe in a smaller quantity, you'll know what it does. Even if then end result doesn't turn out, playing with ingredients is always a good way to learn processes.