A mod to optionally extend the duration of quests when they expire (so you would get a notification "The quest 'Vendeval' is about to fail, extend it by 5 days?" or similar.) The time-limited quests are my least favourite parts to the gameplay.
A mod to travel from a town to others that you've visited (possibly by paying money?) A mod to hide backpacks and helmets via a toggle of some kind; I'd like to be able to see a bit more of my character.