I would like the following things, from the following games, but will likely never see it:
More SP content for F.E.A.R. 2, like maybe a survival arena or something.
New spells for mages in Fable 2
New types of mounts besides Horses in Oblivion
New skill trees and classes for Mass Effect, containing new skills
Fast Travel (Oblivion style, not the boats and silt striders) for Morrowind
New Activities for Saint's Row 2, with their own unlockable rewards
New clothes for Niko in GTA IV
I'd think of more, but I'm pretty sure that's a good start.
More SP content for F.E.A.R. 2, like maybe a survival arena or something.
New spells for mages in Fable 2
New types of mounts besides Horses in Oblivion
New skill trees and classes for Mass Effect, containing new skills
Fast Travel (Oblivion style, not the boats and silt striders) for Morrowind
New Activities for Saint's Row 2, with their own unlockable rewards
New clothes for Niko in GTA IV
I'd think of more, but I'm pretty sure that's a good start.