There is much about my personality that I dislike.
I try to view myself with a mixture of tolerance and a will to improve myself, but recently I have been reminded of a part of my personality that I cannot stand. In fact, i am rather worried about it.

It manifests itself in quite particular circumstances. To wit; when I am playing the team-based online shoot-'em-up, Natural Selection.

Now I have played this game alone, and felt that it has sent my personality in interesting directions, due to it involving team politics, complicated strategy, and a quite significant quantity of testosterone.

But nothing could prepare me for playing it with someone else in a room.
I was sitting on the sofa with Emma (my housemate), and we were having a kind of bored gaming session on our laptops (like you do). I decided to load up Natural Selection because I hadn't played it for a while.

After a while, I made a vague comment aloud to myself (something on the lines of, "Shit, how can they have HA already when we've only just managed a second hive?"), and Emma made the understandable but fatal mistake of expressing interest.
The drawling, obsessive tirade, detailing the intricacies of the game, &c., that came tumbling out of my mouth for the next hour felt liberating at the time, but afterwards I felt a festering horror at what had come over me. This has happened before, you see, but only when I was much younger. I would manage to steer the conversation crudely towards some subject I was obsessed with (generally related to computers; I was a very obsessive child) and do what I might describe as dump all my thoughts on the subject onto them, regardless of whether they were interested in or could understand what I was talking about, or indeed whether they were listening at all.

I'm not sure what's to be done.