I don't think thats an unpopular opinion, Fallout 3 did have a far better aesthetic than New Vegas did and generally just felt better.
Although I must admit that I did like more of the characters from Fallout 3 than I did with New Vegas. Except Ulysses, because he's the best Fallout character ever.
Also it appears the Steampunk theme rumours I heard for Fallout 4 were in fact correct, FUCK YEAH!