A lot of us thought that was going to suck. And guess what, it doesn't. It's shocking really.
As a big fan of the games, I had little hope that Hollywood would do this justice, and they actually did a good job making the world of Fallout come to life. From the music, the food, fan fair items, easter eggs, the vaults, its people and the surface world history, it all came together rather well.
My own dislikes with the movie were few but enough to bother me throughout.
1.I really wish they got another actor to play Maximus and Lucy's brother, I personally can't stand those actors.
2. The Brotherhood of Steel should have been left untouched from the game. Power Armor looked really slow and flimsy, when they were actual walking tanks. The slow motion super hero scene with all the power armor was a little cringe, didn't need all that swagger walk, when they look good just walking normally. Knight Titus didn't need to be a giant douche, could have gave him a very unfortunate death and the show would have lost nothing from doing so.
3. No Super Mutants.
4. Lucy being loosey goosey with Maximus was a little forced. She was basically raped by a raider, which would undeniably gave her VD (stimpack probably cured that though) and could have made her prego (he was probably sterile anyway); But she barely knows this dude, but now she wants to "pop his pimple"? So forced.
That's all I can really complain about, and for a modern day movie, that's say a lot.