No no no, it's your opinion. You're right, an all-platformer world would suck, without the multiplayer. Then again, an all-spin off world would suck too, with lack of single player. It's not fun when you have visitors and all you can play is PMTTYD. It's also pretty boring when you're alone and all you've got is MKDD. I personally prefer platformers, since I'm usually alone. My friends and I can have a pretty good time with Mario Party, since you can't really get competitive with Super Mario World.