My playstyle: Using the whole map, moving all the time, but not running around headlessly. It's not patrolling and it's not rushing. It certainly isn't camping.
It's a playstyle that I have developed through experience, learning the spawns, learning the spots people like to go to, using cover, using unpredictable routes, knowing who to engage, when to engage and picking the right gun-fights. It's a playstyle that uses my brain/thought as opposed to twitch reflexes. I cannot rely on my reflexes (they're not bad) or connection - so I try to take them out of the equation by placing myself in the best position for any gun-fight I enter into. It's also a playstyle that is adaptive - if I need to back-pack n00bs I can play defensively, if I'm playing good players these qualities will serve me well, and if I'm playing n00bs I will be at considerable advantage when playing aggressively.
I don't have a name for it, Its simply experience - and it serves me well - I have a 3.6+ KD, a 2.0+ W/L, numerous KEM's, for example a TDM kill average of 19+ IIRC. So it's effective and I'm a 100% solo player who has never backed out of a lobby and I mention that, because I am proud that I stick around regardless of who I might be playing with or against. If I went negative by 9000, I would still have a comfortable 3.0KD, so having an evening of bad games in a strong lobby does not bother me - I enjoy playing the strong players, like I do sticking it 50-6 against noobs in a 6v6 TDM - which is why I will hang around in any lobby.