Just in case others don't know how these are defined.
Explorer-searches for content within a game. Includes finding bugs and secret areas.
Achiever-works towards in game goals. Higher xp, leaderboards, trophies, outfits, etc.
Socializer-playing with friends, even if they are AI.
Killers-dominating other players/the game. Forcing your will upon others e.g. "fighting dirty."
Probably an explorer.
My dream game, would probably make me more of a socializer.
I tend to socialize a lot with NPCs. I just feel so rude not helping them. In every Mass Effect I was a full on socializer lol.