In spite of the fact that my very first game system as a kid was an Atari 2600 (or rather, a ColecoVision with an Atari 2600 expansion module) I didn't really start getting into Atari and collecting for the 2600 until a couple years ago. Since I've only been collecting for a few years now I don't have that many homebrews yet, but I really enjoy the few that I do have and consider them to be some of my favorite games on the system.
- Princess Rescue (reproduction)
- The Lord of the Rings: The Fellowship of the Ring
- Wolfenstein VCS: The Next Mission
Oddly enough, when I got back into Atari a few years ago the very first game I bought for my 2600 was The Lord of the Rings. It's a fairly short little text adventure that doesn't have much in the way of replay value, but I gotta say that the manual is undoubtedly the most hilariously written game manual I've ever seen. The manual alone was worth the price of the game!
There are still more than a dozen homebrews I'd like to add to my library, but my experience with every homebrew game I've purchased thus far has been really positive so I'm sure I'll pick them all up in time. Zippy the Porcupine, Brik, Lead, K.O. Cruiser, and Skeleton+ are all at the top of my Atari 2600 Wants List right now.