I would like to see a games that actually have an adult rating.
I saw first hand when super-hero games started curbing TS and violence to appeal to a younger audience the popularity died.
Now when you log in to a Super-hero based game there are 20 people idle for 6 hours and a handful of people in the OOC room chatting but actual RP rarely happens and I think a lot of that is because no one builds relationships. People just go there to have play-dates where they punch NPC's with someone who might as well be a stranger.
Maybe it was just me, but the part I liked most about MUSHing in the old days was having connections. I had friends and through them they had friends and some times people would fuck and have relationships, even virtual dates. It was escapism. Some times people would argue ICly. Some times people would get jealous or cheat on each other.
There were downsides to it of course like Colossus and Quicksilver banging their sisters but for the most part that stuff was behind closed doors.
I really think when you force a politically correct rating on a game it kills the depth of the drama that can happen on it. Not just marvel either. I've seen the same things happen to WoD games. You curb sex and violence and it poisons the game.
As soon as a staff tries to stuff human nature in a box to protect the purity of "Any children who might be playing" a game about werewolves gutting people, the game starts to die.
If you look at the popularity of different styles of MUSHes the more censored the players are, the fewer players stick around. This isn't a passing trend. It's every theme, every game that does it.
In this day and age, if someone has been online long enough to find a MU*, download a telnet client and learn how to use the commands, they probably have seen a penis before.
We shouldn't have to give up having in-depth, emotionally impactful stories in order to protect the potential innocence of some kid who probably watches Futa-tentacle-hentai porn when no one is watching.
Just put it right on the log in screen. "This is an adult game. By signing in you are testifying that you are above 18 or the legal age to see adult content in your nation of origin." then if some one less than 18 logs in it's not our problem.