I find it funny. Personally, anyone that plays any game is a gamer. I ignore hardcore and casual less I really need to signify something.
Perspectives.... Every gamer I know plays any type of game. Meaning, I know too many men that played Sims, played Tetris, played picture puzzles as well as playing Witcher, CoD, BF series and such. Their time is mixed on how much and where they are located as well. I know several females that play the same puzzle games and such, and they kick butt with CoD like there isnt a tomorrow. At the same time, they lack alot of time due to family obligations, each male and female is included and not excluded from that. Everyone is a casual player due to time, as well as a hardcore due to the games. And I mean, everyone is wrapped into one: Gamer. Doesnt matter what they play primarily.
I may find younger men that do this "hardcore" silly argumentative stuff, and they really do need to close their mouths, open their ears and eyes and look around alot closer.
The MMO crowds tend to be alot more immature than anything else to be honest. I played MMO's, its drama filled nonsense, and bunch of kids in that mess. I have a cousin that loves MMO's herself, and knows RPG quite well. A guy might look at her and think she is just a punk kid, due to her tattoo's and face piercings, they wouldnt consider her a gamer at first, till she starts blabbing about it. I know, I saw this firsthand, she is my favorite hangout buddy, and I seen this happen. Which, I just laugh at the senseless boys, and turn it back on them for trying to hurt my cuz. One of her boyfriends left her cause she was too much of a gamer even for him if that makes sense......guess he got tired of being beat by a girl? No idea. The whole last paragraph here is actual personal experience and watching first hand.