FO3 on the other hand was the most immature "mature" game I've ever played, with terrible writing. And I consider myself as an easily amused individual.
Maybe you didn't like the writing in Fallout 3; I did. So much so that now my two favourite writers on Fallout 3 have gone to Big Huge Games, I'll be picking up their next game (which I'd have been pretty unlikely to do before) just to see what they've come up with next. I'm confident that the newer recruits who've filled their shoes at Beth will continue to entertain me in future Fallouts, though - so basically I've become a "fan" of two companies whereas before it was only the one.
That's got to be a very slim tightrope to walk with a game like this. Because like has been said, at the end of the day you want to make a game that people actually want to be occupying for a decent stretch of time. Finding that balance can't be an easy thing. For my own two cents, I don't think Bethesda did such a disagreeable job, I honestly wasn't rolling my eyes so very much; and there were some moments where the "mature" theme was driven home quite well, I thought. (I was particularly pleased with The Pitt DLC, where there was no "right" answer, and no matter what you did at the end, it tended to leave a bad taste in your mouth...)
Yeah, the Pitt was a very obvious labour of love and I thought the writing and story was absolutely brilliant. It remains my favourite DLC, though Broken Steel and Point Lookout were pretty awesome.
That said, I'd still like to see greater contrast in the peaks and valleys of the next games, here. By way of example, I'm a bit of Whedon-ite, myself. His dialogue can be quite cheesey, he sticks a little too closely to some well-worn tropes, etc. But one thing I've always thought he does very well is mixing up the dramatic bits and interspersing them with just enough comedic relief. I know I'm watching something good when I'm laughing and crying at the same time. A good Fallout game ought to ideally be able to find that same balance - exposing the raw humanity of people in desperate situations, placing the character in front of some (actually) mature concepts; and then breaking the tension with some ultraviolence and a few witty remarks.
I get that, but I've played some games recently that have made a big play of "mature" themes and difficult dilemmas and left me feeling quite cold, when all is said and done. That's because it's quite
easy, ultimately, to shock people and pull a few obvious heartstrings while you're at it. Yes, it's something Joss Whedon can excel at - but when he descends too far into soapy melodrama it all ends up rather crass and silly (Buffy season 6, Angel season 4).
Really the game that was the best at being "grown up" for me was Mass Effect. Not because it featured a ton of swearing and violence (or fluffers and porm stars) but because it forced you to put
aside your emotions and make cold choices based on what was best for your crew. (Well, unless you were me and you just killed off
because you wanted to hump
).