I need to play Fallout and Fallout 2 again first, then I'll play Fallout 3.
But I have other games to play (again) too ( /!\ TL ; DR /!\ ) :
... Oddworld series, Dungeon Keeper, Doom 2 & 3 (done Doom 1 recently), Quake 1 & 2, Heretic&Hexen, best custom Doom and Quake wads, Duke Nukem 3D, TIE Fighter & X-Wing, Carmageddon series, System Shock series, Deus Ex (!), Postal 2, Serious Sam series, Severance BoD, AvP2 (LAN), Tribes 1&2 (LAN), Vietcong, Painkiller, The Chronicles of Riddick, Mafia + CoLD, FEAR, ArmA, Bioshock (haven't played it yet), ... and some I forgot.
and also give a try to other games like Sacrifice, TRON 2.0, etc...
So I'll wait 1 or 2 years, and when the wine will be fine, I'll go down to the good'old'cave, after all the patches and mods releases and see if Fallout 3 is that bad :)
=> Don't wait for sequels, play your games and fake the surprise when a sequel is released, just like you do at christmas ! :)
NB : And if like Dungeon Keeper, it really needs a decent sequel, add to your project "Do Dungeon Keeper : Back To HeII" and see what you can do (ed : maybe it will take years, but it will be done).