These are personalities i have encountered both ingame and on the forums. Many people are not specifically one type, but are in fact combinations.
The Pirate Personality List
The Blowhard: This person goes on and on in Comms and/or the forums touting their own superiority. They are dreadfully long winded and often find themselves in verbal conflicts with others. Odds are this person suffers from a deep inferiority complex.
The Ninja: The ninja never attacks bases. They are constantly being yelled at in Comms for attacking players that are mining, salvaging or coming out from a base attack. These people tend to live in perpetual bubbles.
The Chiwawa: This person is mildly effective at the game. What they are most known for is hiding behind their brother/sister/spouse/partner/friend. They will blather on in Comms about anything and everything, but the moment it is time to fight they are full of excuses. Hit them and they will go running to someone else to make you pay.
The Messiah Complex: This person sees themselves as the protector of all the lower levels members. These are often (not always) the ones that Chiwawa’s hide behind. They can often be identified by the statements they make in Comms after winning a fight, “Now that you have learned your lesson you will know how to act in our sector”.
The Comms Cop: This person has taken it upon themselves to moderate Comms behavior. They often justify their own behavior with statements like, “My kids/grandkids play this game”.
The Role-Player: Fortunately these are few and far between. This 30something fits some or all of the traditional stereotypes of gamers. Think about the guy in the WoW episode of South Park.
The Coiner: This person is willing to shell out large sums of money to purchase whatever shiny new item has been introduced into the game. All that matters to this person is having as much of an edge over other players as possible.
The Hacker: There are two types of hackers, the fast and the slow. The fast hacker rapidly levels up and attacks as many people as they can for the purpose of antagonizing the sector. This person is easily identifiable and has their account quickly banned. The slow hacker is harder to identify. They selectively use their hacks so as to look like a coiner.
The “Legitimate” player: This self-righteous person brags about how they have not spent any money on the game. They see themselves as a player that has “earned” everything they have and mock anyone that has spent any money.
The Know-it-All: This person knows everything there is about the game. They condescendingly point out to everyone both in Comms and the forums all of the flaws of base/fleet design. This person is more of an armchair Admiral then a battle hardened pirate. They care more about theory craft then actual application.
The Troll: This person is different then the person that occasionally make a troll-like statement. This person is simply incapable of adding one iota of intelligence to a conversation. Watch out for the Drunken Troll variant. They are even worse.
Edit: Added Bubble Buddy
The Bubble Buddy: This player shamelessly begs people to bubble them. They only break their bubble to attack someone. While sailing home they beg anyone on Comms to bubble them quickly so that they do not have to deal with the consequences.
Unfortunately, players repeatedly bubbling each other are abusing this system.