Nothing like some good Circus Charlie or Tetris.
I'm sorry that 2D has been forgotten so fast, most of the 3D games are focusing on the image quality rather than the fun factor. (like Cyberxion said)
On that, they also put alot more time on sfx, which I totally agree is a good part of a game that his almost always neglicted, but still they forget about the fun factor. I could also complain about the always more technical gaming, pushing 5 butons only to jump in a game.... Just have a look at yer old Atari joystick. How much buttons you see? 2?!? Whoa, you got the special edition of the Atari joystick?
Now look at that GC controller. How much buttons on this one? I cannot even count up to that.

I think I enjoy 2D more than 3D, seeing how I love capcom fighting games and japanese shooters and beat em ups. I don't want to play Luigi's Mansion or that crappy Mario Sunshine.
Do you see billions of blood stains in Street Fighter? Now look at Bloody Roar 3.... deceiving. While BR3 still a great fighting game, is all this blood necessary? Don't you enjoy having a clean look at your opponent when fighting? I'm sure you don't like to have that blood splat in the camera!
Look at the sky in Halo, more directly at the sunshine. What do you see? Nothing? Even thought that lense type effect is well done, wouldn't you like to see more missions than that?

I think were losing game fun factor because were gaining GFX and SFX. Maybe not directly, but in a certain way, the game conceptor's put less time in making a good gameplay than in making a realistic (or not) world.

I dunno, if Cyberxion got any money left in his bank account, we could try to do a 2D only console?
128Bit only for 2D, wouldn't that be great? (insert Irony here) Eye candy + Great gameplay + 2D style, you can't ask for more.
Only kewl 2D games, pure retro gaming stylez baby.