Well, simply, I only need about half the theme ideas, and i have some personal favorites... but even though with games you can make them as YOU want, if you ever hope to make it for sale, you have to take in other peoples interests as well.

Unless you plan on being a total rebel :P

But I'm not that much of a rebel... I want to know what you'de like to see

I certainly understand that the type of gameplay can very much influence the types of levels you'd like to see... hopefully without this information it will force you to think about being immersed in these enviroments, and decide what looks 'cool' to be there, no mattter what size you are.