Ill use the term that Commander Advisory Group (CAG) member and noted giant thinker Jim LaPage brought up a while back when he and I were talking about it: casual Commander is acompetitive that is, the absence of classic competition structure and attitude
You can run a successful sellers username through the eBay competitor research tool, which shows their revenue, sell-through, and best-selling products, so you can stock toward proven demand
Wildfire has a nice symmetric effect, angering all of your opponents equally
Scattered amid outright jokes and deep-cut references to 1990s Magic culture, there are cards like Organ Harvest cards which appear to be silver-bordered for no greater reason than a reference to multiplayer
Card Draw I shoudn't even dignify this category with pictures
So it's important to check the most up-to-date banned list for your playing format