I freely admit I love winning.
PvP is one of my favorites in RP, and my competitiveness as a person carries over into this well. It's obvious, and I don't really hide it anyway, so there's that.
In short? Yes, I will endeavor to win. I will pick apart a post in detail and study the mechanics and be obnoxious about something as "inconsequential" as foot placement.
I'd wager a lot of that stems from the fact that I practice swordsmanship in real life. Of course, this is fantasy, with Force-powered, glowstick-wielding ninjas running about, and a lot of what I know perhaps shouldn't have a place here.
In the end, though, pedantic or not, I find that PvP is best enjoyed with a good helping of OOC rapport, a side of thought-out posts and, most importantly, a cold beer*.
*or a suitable non-alcoholic substitute, if you won't/can't drink alcoholic beverages.