If you choose to start in DC, then I'd like to see a mod that reduces your level when you first get to NV from DC. Maybe a bonus SPECIAL point or something. The big difference from how things are now is that instead of waking up in Doc Mitchell's place, the player would wake up wherever they went to sleep, (after seeing the '9 years later' screen / whiteout effect) and be awarded some kind of challenge reward or accomplishment. Once the train is taken from DC to NV, the mod would stop doing its thing, and the player can travel back and forth freely. The idea is that a bullet to the brain requires some time to heal, and the Courier might 'remember' his past in dreams.

You would not keep weapons and such between wastelands (at first), but you would keep XP. The idea is that if you start in NV, you travel back to DC when you sleep. Actually, I'd like to see a menu when you first select 'New Game' that asks where you want to start, combined with the 'inception' mod that got some discussion on the old forums. I'd like to see the option of starting in NV as well.