I've lurked these forums for a while and in the interest of actually posting on topic I'll share some of my "pvp" experiences.
I've played most of the major MMOs since SWGs in some way shape or form and have pvp'd in most of them. My experience in the hardcore pvp games is somewhat limited I will admit, but I'll also put forth the opinion that most of them haven't really been worthwhile games. I would have loved to pvp in EVE (despite it not being twitch) but the things one has to do to gather the money as a new and friendless player were entirely too boring to make it worth my while.
So on to two stories who's major themes have always served me well in pvp.
Stay calm under fire:
This is a vanilla WoW story (yeah, yeah, I know...). A group of us were wanting to kill the boss in the Dire Maul arena (free for all pit!). The boss itself would have been a joke for us (two were hardcore raiders and the other three of us were pretty competent) but there were a gaggle of Horde people milling about watching. The two raiders were anti-pvp and were very skeptical about jumping in as they were afraid of getting attacked. Eventually we were able to talk them into it with the advice: "Whatever happens, you two stay on the boss and stay alive. We'll deal with the Hordies."
When it was obvious we were going to kill the boss with ease, the five or so Hordies attacked. The three of us that were pvpers turned and instantly focus fired them all down systematically. They weren't pushovers but I don't think they were really expecting the concerted and calm reaction to their attack. We'd talked through the scenario before hand and basically had a plan for "what can possibly go wrong". When the poo came flying we reacted per the plan and remained calm.
The best part was the exhilaration of the PVEers from the adrenaline rush of the fight. We didn't quite make pvpers out of them, but they saw at least a little bit of the draw for it.
Make use of your environment:
This second story isn't about computer games. It's actually about a NATO wargame, but these canned scenarios are often very similar to video games in a manner of speaking (plus I can talk about them without violating any classification rules). I was the officer of the deck of a fast attack submarine with the goal of "destorying" a high value unit. They have us go to point with a plus/minus distance and a certain time and then start the scenario. Basically this actually gives them a fighting chance because honestly, other than the canned scenario noone really ever knows we're there.
The Captain and Engineer had this new "tactic" they like to use to get a better battlefield picture, which I was against based on having been brainwashed that stealth was everything. They would broach the sail of the sub just long enough to rotate the radar a few turns and get a clear picture of where everything was located. Other than the annoying procedures to carry out this evolution it wasn't all that big a deal, but this time there was a ship in the line up that had a spy-1 radar (know your enemies), which can see a car moving down a road at 200 miles. Needless to say it wasn't very long before a P-3 was up in the air looking for us and dropping active sonar buoys.
From a previous scenario I knew that the standard operating procedure for getting away from these things once detected wasn't really going to work (the same Engineer had made me pull out the book and use the SOP). After telling the Engineer "I told you so" and being told to "Shut the F up." (I had told him it was a bad idea prior) I told him I'd like to try something different. I knew the water conditions and how they affected sound propogation in the water and I knew where the other ships in the area were due to sonar and I had good firing solutions on every one of them. I figured out where to put the sub to basically shield us from the active pulses of the sonar buoys before they could really pinpoint us and go for a kill. It wasn't long after that, that we "destroyed" the high value unit.