I joined the Space Marines. Cause they're cool and they gave me nice power armor. First I tried to do a moral choice but then I decided my character will be naive and take everything he's told at face value, so he just bought all the end justifies the means talk (actually he pretty much just ignored it while ogling the shiny power armor). * * * So anyway Skyrim is in many ways more immersive, it does feel like a whole continent (the climate differences between the north and south help a lot with the illusion), there's a lot of verticality on the map (probably more than any other game I've ever played) and you can definitely fire it up and do NOTHING for hours (just hike around, pick flowers and butterflies etc). FO4 is first and foremost a shooter.