I'd like doors and chests that need unlocking to have a different way around.
If I have to unlock it, why do I have to pick the lock? Can't there be another way around, or can I not blow the lock up?
If I have to hack into it, why can I not just destroy the security around it?
Optional unlockable rooms, why are you always just the one room, corridor, etc? Why not an alternate path to the dungeon, maybe with better loot but more monsters?
I'd just like to be able to have more ways to do things, because in some games, you HAVE to pick locks, or HAVE to do this that and the other, regardless of playstyle.