It is a bit of a pretentious premise, the idea that there is a standard of "maturity" that is objective and can be measured, and that you enjoy these games mostly because of this "maturity" as opposed to other factors. The fact is that you liked them and see them as deeper than other games you did not like does not necessarily mean they are objectively maturer than anything else. It just means you liked them.
That's not to say that I'm disagreeing with you on your choice of "mature" games, though I do think Bioware has its moments, you haven't played much of it if you think it's all teenager-y. You may not have liked the gameplay as much as the other games, that doesn't mean that Fallout NV is objectively more mature than Mass Effect (I'm not just replying to the OP, but to everyone, in that sense). Personally I found the Legion in FNV to be absurdly evil, even if it was interesting when talking with Caesar. Whether they were realistically exist is another argument, the whole world of Fallout is so ridiculously unrealistic from FO1 that arguing it is a bit of a moot point, but I felt like having yet another ridiculously evil "antagonist" (if you can all them that in a game like FNV) sort of took some of the supposed "maturity" out of the game for me. It's an otherwise great game with only a few flaws and such. I thought the Qunari in the Dragon Age series was a much better "antagonist", one that was actually fairly complex in their motivations, and the culture was much more than just "stupidly evil in every aspect". When I was fighting them, I didn't feel like I was fighting a villain in the traditional sense. That doesn't mean I think DA is more mature than FNV, both have their spots, I'm just recognizing that it's not all that clear cut.
So yeah, saying games you like are "mature" where everything you don't like are "immature" is a fairly immature thing to do. I actually thought Recettear: An Item Shop's Tale dealt with a lot of situations and mini-stories that I greatly enjoyed, and can actually make you re-think what is generally considered to be maturity in a traditional sense. But mostly I like it on its own merits as a combination item shop management game and dungeon crawler. Someone also mentioned the Persona games, which touches on subject manner most western games can't or won't go in detail about.
Whether the game holds your hand or not is a completely separate issue that has nothing to do with the maturity of the game. Especially with older games, they used to actually come with manuals which gave you a fairly good background on how to play the game, now all the tutorials are inside the game.
That's not to say that I'm disagreeing with you on your choice of "mature" games, though I do think Bioware has its moments, you haven't played much of it if you think it's all teenager-y. You may not have liked the gameplay as much as the other games, that doesn't mean that Fallout NV is objectively more mature than Mass Effect (I'm not just replying to the OP, but to everyone, in that sense). Personally I found the Legion in FNV to be absurdly evil, even if it was interesting when talking with Caesar. Whether they were realistically exist is another argument, the whole world of Fallout is so ridiculously unrealistic from FO1 that arguing it is a bit of a moot point, but I felt like having yet another ridiculously evil "antagonist" (if you can all them that in a game like FNV) sort of took some of the supposed "maturity" out of the game for me. It's an otherwise great game with only a few flaws and such. I thought the Qunari in the Dragon Age series was a much better "antagonist", one that was actually fairly complex in their motivations, and the culture was much more than just "stupidly evil in every aspect". When I was fighting them, I didn't feel like I was fighting a villain in the traditional sense. That doesn't mean I think DA is more mature than FNV, both have their spots, I'm just recognizing that it's not all that clear cut.
So yeah, saying games you like are "mature" where everything you don't like are "immature" is a fairly immature thing to do. I actually thought Recettear: An Item Shop's Tale dealt with a lot of situations and mini-stories that I greatly enjoyed, and can actually make you re-think what is generally considered to be maturity in a traditional sense. But mostly I like it on its own merits as a combination item shop management game and dungeon crawler. Someone also mentioned the Persona games, which touches on subject manner most western games can't or won't go in detail about.
Whether the game holds your hand or not is a completely separate issue that has nothing to do with the maturity of the game. Especially with older games, they used to actually come with manuals which gave you a fairly good background on how to play the game, now all the tutorials are inside the game.