fallout 3> the elder scrolls 4: oblivion
Gameplay: classic rpg style gameplay. levelling up improving various skill (medicine, lock picking etc.) play it as first or third person but i suggest first. you play it out like an Fps (no cod reference intended) but stiff movement and ADS spoils it kinda. but Vats is awesome by far. so are the weapons.
Sound: music is by far epic and with that classic 1950's music. acting is...good and they have plenty of voice actors now (well more than oblivions anyway).
Look: enviroments are very well detailed glitches are still here yes but not very noticeable. character models could be much better though.
Overall: epic game get it. rpg heaven!!