It wasn't always this way, but my friends and I love commander at the moment. We all love how fun, casual and thematic the decks can be. Having one commander to build a deck around and using their colour identity feels really fun and flavourful.
Also, it's just super fun to play long multiplayer games. We get to hang out together for an evening, drink a few beers, listen to some music, have a laugh and turn things sideways. The social side of it is the best.