Ok, the Wii and 360 have been beat to death on this thread. What about the other consoles? The PS3 isn't the pinnacle of perfection either you know. I hate the touch sensitive power and eject buttons on the PS3! What a useless gimmick. Sometimes, when I'm trying to eject a disk, I touch the flat area a fraction of an inch too close to the power symbol and the PS3 shuts off. Other times, the "buttons" don't seem to be sensitive at all and you feel like you are having to squeeze the ledge they are on to get the system to shut off. I also hate the "scratch proof" Blu Ray discs. They are not scratch proof by any means. Yet when they do get scratched, you can't buff them without messing up that coating and making matters even worse.
The only reason the 360 scratches discs is because either you are sitting the system on its narrow end or you are messing around with the console while it's spinning discs. You can get the PS3 to do that too if you bump the console enough while a disc is spinning. The Game Cube and PSOne are the only disc based consoles to get it right (their disc spindles had ball bearings to hold the discs solidly in place while playing, not stupid magnets that can't hold the discs worth beans).
Another stupid "feature" of the PS3 (yes, and the Wii has it too) is the slot loader. I hate having to shove the disc into the slot and watch the console drag the poor thing in. Talk about a scratch waiting to happen. If you don't insert the discs just right (and what little kid even trys to), you wind up scratching the heck out of your discs by just loading them. As long as we're talking disc loading, just about all computers and consoles seem to be designed to scratch discs. Even the ones with disc trays like the Xbox, 360 and most computers have sharp edges on the inside of the tray. What for? So you can scratch your disc if you don't line it up perfectly with the indentation in the middle?
I work at a store that sells and buys new and used games and consoles. Let me tell you, no console is perfect. We see every make of console and the games for it come in for repairs. When it comes to fixing scratches in discs, we see the fewest ones for PS3, but when we do see them, they are almost always a lost cause as I said before, due to the "scratch proof" coating that you can't buff. About 99% of the time, when we get discs with the ring scratches on them (for any console, not just 360), the customer will admit that they tried standing the console up on it's side.
That's probably the biggest marketing screw up in video game history. Why do they show the consoles standing on their sides? It ruins discs and will eventually ruin the console. Maybe it's an evil scheme to get gamers to stand their consoles on their ends so their games and systems won't last as long and they'll therefore have to buy even more of them.