I have an impression that some games are getting darker, with a lot of black, gray...

Example: Zelda Twilight Princess. Zelda games were always fun, colorful and happy. But the Wii version is much more obscure...

Yeah, I know it´s because of the Twilight, but it´s still too dark. But don´t misunderstand me! This is not a bad thing!

Another example: Metroid Prime Corruption. Metroid games were always dusky, but the Wii version is a little more...

Look at that opaque Power Suit! It´s so strange...

Well, I think it´s only an impression of mine.