I started with GW with 1st edition and have always enjoyed 1e and 2e. Then with each successive revision of the system something was lost. 1e and 2e were somehow both grim and whimsical at the same time. That mankind had blown up the world through petty squabbling made the GW backstory much more interesting than "the aliens got us". It's clear why it was done; Ward and Jaquet overreached on the original timeline. Some of the high-tech stuff in 1e looks dated even now, let alone for 500 years in the future. So the aliens were brought in to speed up mankind's demise and make the tech more near future than far. Don't bother. I know that it's unlikely that internal combustion engines will be in wide use in 500 years (hell, 100 years), but it just doesn't matter. I know that Pittsburgh will have changed considerably in 500 years (unlike the map that was i
ncluded in 2e), but it just doesn't matter. For me GW will always be about The Shadow Years, The Apocalypse, and The Ultimatum. In my GW world the Dragon #88 "Before the Dark Years" timeline is canon. Please use it.
Other good stuff:
*Bring back the robots (somewhat related to the above).
*Andriods are evil and, to the eyes of a typical GW inhabitant, damn near a force of nature.
*Cryptic Alliances
*Gamma Luna, Mars, etc.
*Oh, and while we're on the subject, what happened to the *rest* of the world? Focusing on North America is fine, but give us a little info on Gamma Australia, etc.
*Herps, the Great Red Wyrm of GW
*Everyone's favorite defect: Poor Dual Brain.
And some bad:
*Instant kill anything.
*How about a sane progression system for PCs for a change? (If it's d20 I guess that's already taken care of, but GW 1e, 2e, or 3e really did a poor job of this).
*Deevolution
*Punny creature race names
*"Helpful" mutations with severe drawbacks (photosynthetic skin, anyone?)
*Random mutation generation