There was a rather popular thread about this over at SSC a while back. I would say that I, as well as probably most people, use a different type of gun depending on what the occasion is. In Mississippi when we fight small battles in the woods/park/golf course I like to use my XP 65 and do hit and run type fighting. Lots of maneuvering, always running, trying to pull ambushes. I had the same fighting style when outnumbered 2 to 1, except I used my CPS 1500 then. It varies a lot, but in soakfests I am definitely a runner.
It was a lot easier to classify positions and fighting styles when we had an actual team. I do believe in team positions under the right circumstances. That's why I haven't taken down
Sniper's Guide,
Scout's Guide, and
Ranger's guide after all these years - though I do plan to update them to make them current sometime in the next year. Red Scorpion would typically have 2 squads, an elite ranger squad called "the Long Patrol," and another more traditional squad. Typically the Long Patrol would have 8 guys, with at least 1 scout, at least 1 tanker/heavy weapon, and the rest of the guys would be "rangers," basically elite grunts. Our fighting style, as a squad, was typical guerrilla warfare, relying heavily on speed and stealth. There are so many occasions where we would show up behind enemy lines and take them by surprise, then disappear after we got a flag or a lot of hits. We got to the point where our scouts were genuinely good at tracking people down through the woods and leading the rest of the team. One of them went on to Marine scout sniper school.
I would like to have battles like these again, I really enjoy the guerila style. That's what Dux and I did in the 1hk game of Downpour 2011. In Hydropocalypse I was a tanker/heavy weapons officer with my 300, but usually these days I rely on speed.