If someone looks down on you for being a gamer, that may be because he went online and experienced the friendly xbox community for himself. Some of the People there are rather friendly and sometimes listening to the People there sounds like a mental Asylum. There are some other "interesting" Communities to be found in PC games. Like in Counter Strike; try going in there as a newbie.
Many People know of some Places (online) where insanity seems to run free, but this kind of gamers seem to freely admit that they go there. I can think of some People who wouldn't freely admit that they wrote Fanfiction because some Fanfiction earned some bad reputation. With Reason, some Fanfiction makes you doubt in Humanity...
I need a term to describe this kind of gamer, if only to set it apart from everyone who ever enjoyed any electronic videogame device...
The "Triple A Gamer" (one who plays big Budget games formerly known as hardcore games) goes to places others would want to avoid in conversation. Those others may think that this Person may have some obsession with the hobby that allows him to switch off the "shame" reaction or maybe they think the "Triple A" Gamer is just too plain stupid to know why the "normals" try to avoid telling other People stuff they rather keep to themselves.
Online gaming is for some People like having cybersex, write fanfiction or something like that. And here you are blurting out the Fact that you have been playing online last Weekend.
That's disturbing; they know they find this pathetic for some Reason, they think they know that Reason but somewhere in the back of their mind they know that there are some decent People to be met online. This Gamers knows how to find them. They do not.
So next time you're asked what you did last weekend, tell them you bought some booze and got so drunk that you puked on your Cat.
With Videogames still being viewed as a childrens toy by some People, they'll be less condescending this time.