Additional Question
For those of you who collect disc backups, do you try to "special edition" them by adding things like the game soundtrack or corresponding DVD movie with the game disc?
Eh, I didn't pay attention to the section this poll was posted in; so my vote is actually using a USB HDD for Wii backups. For the PC, PS1, PS2, DC, GC, I burn them to discs, but I don't try to "special edition" console games as it's pretty much pointless because if you want to access that content most of the time, you need to read the disc in a PC's drive. I do include stuff such as updates and backups of DLC on PC backups, but I've cut down on making backups of my PC games due to mainly buying PC games on Steam now-a-days, because most games end up activated on Steam whether you buy a physical or digital copy.. I do keep the serials of various Steam games backed up should Steam ever go out of business, that way if I can get my hands on the game's installation files, I can use my legally owned serial.
Also, I'm completely aware of the HDD options for the PS2, and using Wode for GC games, but the disc methods work just fine to be honest, it's not worth the money for a slight convenience, since DVD-Rs are dirt cheap; also, I don't use mini-DVD-Rs for my GC, as I have a replacement case that allows the use of full sized discs. My PS2 revision isn't compatible with the preferred HDD method as it's the latest revision of the slim released in the United States, and the PS2 doesn't have USB 2.0 ports, so loading games via USB would be too slow, and there's various compatibility issues with USB HDDs.
I'm also aware of the ability to load GC games via streaming from the PC using USB, or one of the Gecko cards with an SD cart, but again, there's quite a few compatibility issues that causes it to fail justifying the effort. I'm also aware of loading games on the Dreamcast via SD, but as another person mentioned above, there are quite a few issues that make it more of an annoyance than anything.
Also, I don't waste time and effort making the discs look legit and give them a nice printed label and "official" looking case, I just simply write the name of whatever is on the disc with a sharpie.