1) No problem with it as long as it's realistic.
2) Of course it's a lot more prevalent now, although there was the odd character that would pop up. One of the great antagonists in gaming, Revolver Ocelot from the Metal Gear Solid series, was heavily insinuated as being gay or bi without it ever needing to be confirmed or denied. But there were minor characters, like a teammate from Binary Domain who wasn't all "hey look I'm a lesbian", she was just there in the background.
3) I reject the notion of a 'community'. People who play games play games, and there are forums online where a few specific demographics can be found. On forums etc., there are a vocal lot who react badly to any representation of minorities. As with 'real life'. The type who calls everyone snowflakes... while spending their lives being offended by every little thing, banging on their keyboard/phone ranting about it... but I suspect the majority are nonplussed.
4) I don't want to see the industry fall into the trap of going from one extreme to the other - under-representation to over-representation. Keep it realistic and proportionate, don't make characters gay or female for the sake of it just as we had straight white males just for the sake of it.
5) As a straight male, it's not bothered me or affected me. It's nice to see variety, rather than the main character always being some hunky horndog who makes everyone drop their panties in seconds.