My ideal pack would ofcourse be involving cars. Obviously >:) But to make it all even more 'macho' a world with race tracks. Not to race like a race game but for a racer career. There would be a car factory where you could work, or be the CEO that has to convince the sims to change to electric cars. I even think it's weird I have to suggest this as a "manly" pack because in my real world this should be gender neutral careers.
Another one. Airport! where you could turn an entire map as an airport where you bascity have to do airport work. A micro management game where your sim needs to do task to make the airport running. The map could even be used to take your plane to go on vacation to the packs I didn't buy but will definitely need