>>7154114The first good Lego mecha, for one. The modularity between sets was also fantastic. You could split most of the sets apart into modules that could recombine with others into who knows what. The Martians were unique figures and honestly just looked cool at the time. Then you add things like how Mars was everywhere at the time, and you had a perfect storm for a theme. The lack of conflict like
>>7154112 pointed out was also a plus. I would love for more of those, it changes the status quo and makes for a better theme if you ask me. Overall though it was just unlike any other Lego theme at the time and still stands as fairly unique.
