So I had an odd thought.

You are you, and a publisher comes to you, and says something to the effect:

“So we've noticed your work, and we are impressed. we will give you millions if you make a __________ game, with our exact specs.”

Thinking what you'd say yes to is easy, but what would you say no to?

What would you NOT want to make?

So for me, I feel like I would NOT want to make an MMO, designing it would be a nightmare.