You'll soon realize that the shooting mechanic isn't that great. VATS is there for a reason.
This is why calling it an FPS masquerading as an RPG is wrong, that implies you play for the shooting mechanics when it's generally better just to switch to VATS. A better example is Mass Effect 2 or Deus Ex, and in the case of the former they were fixing the weakest part of the first game and in the case of the latter the RPG elements are heavier than most proper RPGs these days.