Over the years, I've discovered that lessons in cooking come in two forms. There are the lessons that you never fully learn; skills that you get better and better at, but never quite perfect. Then there are the lessons that you only need to learn once because the results of not following them will literally scar you for life.
Brussels sprouts are unique creatures. When cooked poorly, they can give off a strongly sulfurous aroma that many find unpleasant. But if you can crack through that aroma and release the natural sweetness hiding underneath, then you're rewarded with one of the most delicious vegetables around.