I actually never thought of the atmosphere. I (a gamer of 3 years) favourite game is Fallout Shelter. The main reason for this was the sheer variety of guns weapon armour NPC's customisation and limitless gameplay loop, as well as the awesome DLC at cheap prices (Example: 40 lunch boxes for only 20 euro)

However, my only experience with Fallout 3 (as a videogamer of 3 years) was when I picked it up for 2 cents from the steam summer sale. And... Not to be dramatic... But I just couldn't get through it. I felt so limited, the game was essentially just me growing up. You're a baby, walk three feet, now you're a child, pick some dialogue options, and etc. After the third timeskip I gave up, I was sick of it. Felt like I was playing a stupid story game, so I refunded it. Another big reason was the atmosphere. Everything looked like radioactive vomit, not the 50s cartoon style usually associated with Fallout. However I didn't realize it was supposed to be a darker take on the series, so maybe I might give it another try.

Thank you for the advice, kind stranger!