New Vegas isn't a Bethesda game. It's Obsidian, hence the superior game.
I agree that jrpgs are a thing of the past. As a n64 owner I used to look at the psx jrpg-catalouge with envy. The games were grand in scope and seemed to offer a true cinematic adventure with the fmv's and 40 hour completion times. So I played a lot of them when I got a PS2 and man, have I gotten sick of the thoroughly shitty story-telling, characters, writing and gameplay. Now that technology is more advanced, games don't have to sacrifice gameplay for scope and so, I have no interest in jrpgs whatsoever. They bore me to tears within an hour, and the genre-conventions and terrible dialouge makes me cringe.
I don't know if that's even controversial as many seems to be of the same opinion. I guess it has something to do with growing older as well.
It is ok for you to dislike JRPGS, don't get me wrong. I am not an ardent fan myself, especially not for those on home consoles. However trying to attribute it to growing older seems a little off. If by that, you mean that you haven't the time any longer to devote to what tends to be one of the longest play-time genres, then fine. However if you are saying they are a childish genre, that seems far too broad a generalisation.
The homogeny of JRPGs is vastly overplayed. Look at Final Fantasy XIII/2 next to Xenoblade, or Dragon Quest IX, or the latest Tales game, Pokemon, Mother 3 or Persona 3/4. Obviously I am showing the most famous JRPGs of recent times, but the point is that there is such a huge amount of diversity in the setting, atmosphere, mechanics, music and art, that I find such generalisations ridiculous.
In summary, there are many derivative and dull JRPGs, but the same can be said of most genres, especially FPS/TPS'. I feel that with the advance of technology and western development, the quality of the average JRPG has declined relative to the wider market, but there is still a tremendous amount of well-made games in the genre to satisfy anyone. Just take the time to find the right one.