The interaction between the Player Types is quite interesting, but keep in mind that griefing is a Killer trait. Extensive studies show that to have a stable population of Killers, there needs to be a substantial non-majority of non-Killers and if I recall correctly, the only Player Type to happily co-exist with Killers are Explorers, all of this because of the griefing trait.
Extra Credits covers this topic quite a few times. It’s worth checking out.
I personally don’t think someone is a single player type, but they shift around between several depending on what they want at that moment, but it works for study purposes to look at the four types as if they are discreet people.