My most favourite would be The Elder Scrolls IV: Oblivion. Big world, lots to do and to add via mods, and I love Fantasy and old time so it is totally my kind of game.
(Hm, thinking of it, Oblivion uses physics, perhaps someone should make a mod that you can use doors like in Amnesia.
Other games I love to play are World of Warcraft, but not playing it to farm dungeons but for the lore, I am on a role play server there though role playing is bleeding to death pretty much.
That's pretty much the games that I still play from when they came into existance, other games which lack freedom and replay-value pretty much end up in a box after one or two playthroughs. I hope Amnesia doesn't, assuming I'll be able to gather the guts to play through it.