There is a personality classification system for gamers based on the four suits of playing cards.

Hearts game for the positive social interactions. They like to chat, and give each other "hugglepounces" all the time (whatever those are). They're the ones joining RP guilds, perfecting their avatar appearance, decorating residences, and organizing player-led events for participants from level 1 to level 1023. They actually use the emote gestures. Might cyber with you, if you are nice. If they kill you, it is mainly to watch the victory dance.

Diamonds game for the glory. They want to climb to the top of the leaderboards. If the game gives points, they have a lot of them. They lead PvE dungeon raids, and give helpful tips on how to increase your DPS by 0.1% with only a complicated series of keypresses that must be memorized and replicated with perfect timing. They have max-level characters, with all skills unlocked, and several have solo'd the Big Bad Boss designed for group raids. They do speedruns.

Clubs live for PvP. They lead AvA raids and guild wars. They feel that AI opponents are no challenge at all, and the only way to truly master the game is by defeating human players of equal or greater skill. All griefers are majority Club.

Spades wish to dig up all the secrets. They explore every area, and know where all the easter-eggs are hidden. They have done every quest and read every FAQ, and have likely contributed in some fashion to the wiki. They perform complicated experiments to verify hypotheses regarding formulas and mechanics. They may make obscure references to in-game lore and real-player history and expect you to get them.

Any given player can exhibit multiple types. A Diamond-Club likes to hit the top of the PvP leaderboards, specifically. They want to be named Emperor, or Warlord, or Arena Champion, or whatever title is awarded to the best at PvP. A Diamond-Spade has earned all the possible achievements, especially the secret/hidden ones, 100%ing the game. A Diamond-Heart will group with you to help you earn levels, and will gift you with a master-crafted set of equipment. Heart-Spades will organize scavenger hunts and make puzzles with user-created content. Club-Spades obsessively analyze the metagame, and invent weird character builds specifically to defeat the most popular builds. Club-Hearts are rare, and may do things like organize a fight club of RP duelists.

In my opinion, it's the Diamonds and the Clubs that tend to ruin a game's fan community, with elitism and anti-cooperation. Too many Hearts can make it a bit saccharine, and too many Spades make it nerdy, but as long as either of those two types dominate, the community remains civil. A non-competitive, casual game, or one that favors strategy over twitch/reflex skills tends to drive off the Diamonds and Clubs. While griefer Clubs can make a game tedious for others, a guild of Diamonds is the worst--they're like the cool kids clique in high school, and you aren't good enough to eat at their table. If a game cannot effectively insulate Heart-ish players from the Diamond-dominant and Club-dominant, they will abandon the game, and the community will grow toxic.

If your game does not cater to Hearts, you probably won't want to moderate its message boards.