I’ve just been playing this recently along with some other games. I started the Point Lookout DLC just yesterday. They say this is the best out of all of them. I’ve also played Operation Anchorage and The Pitt, but that was when I bought the first retail pack with both of them in. This is why I avoided buying the second retail pack, because I was waiting for the GOTY edition.
The Fallout 3 Game of the Year edition includes Fallout 3 as well as all the DLC packs - Operation Anchorage, The Pitt, Broken Steel, Point Outlook, and Mothership Zeta.
Ignore the average D2D reader score of 6.6 on the site. It’s a very good deal with practically 6 games in one. The only deal this good was likely the Orange Box years ago.
Each of the DLC packs were originally priced at $10, and with the GOTY edition priced at $49,95 on D2D (slightly cheaper than Steam - by a few cents, lol), you’re basically paying for the DLC packs and getting the original game, Fallout 3, free. The only way you can buy the individual DLC packs online is through Games for Windows Live.
You can still get the retail version of Fallout 3 GOTY edition though, and cheaper too – for the PC at least.
Note: I’m just giving some advice here as regards playing the GOTY edition. It works best with a clean install, and perhaps even with a saved game with an unmodified game if you all ready have Fallout 3 on your PC. You’ll need a patched version of F3 if you don’t use the GOTY edition. If you’ve played any of the DLC packs before, the save games may not work properly if at all, seeing as the DLC packs are essentially reinstalled. I found this out the hard way.