*A bewildered looking person runs across the thread and yells, "Run away! Ghurm is about to ramble!"*
Hello, fellow CotHians!
I think a lot of us might disagree about what the words "good" and "evil" mean. They are subjective things. Here's my opinion.
I don't think there
are evil characters, but I think that characters can
be evil when they embrace any of the following evils. Okay, okay, the last one I list
is an evil character, but it makes sense in its context.
The "necessary" evil
The necessary evil, as I define it, is doing something harmful because you thought it was necessary. The characters that embrace the necessary evil are those that don't realize that what causes them to do harm to other people is actually fear. They thought that somebody or something was a threat, and whether it was or not, they harmed that somebody or something. When put on the spot about doing this, the character that embraces the necessary evil will try to justify his/her act by pointing out what they thought the threat was and what they thought was the necessary action to eliminate that threat. A lot of characters in WoW embrace this evil because of factions and xenophobia. The necessary evil is something that is difficult to realize and
not embrace.
The evil that lacks capacity for empathy
Empathy is the ability to consider and contribute to the feelings of others. The lack of empathy, or the lack of capacity to be empathetic, I would consider evil most of the time. The exceptions for me are those with mental disability or non-aggressive psychological illness (they're just cursed with mirror neurons that don't work right, can't be blamed). The characters that embrace the evil of lacking empathy or the capacity for empathy are those that...well...don't have empathy. It's definitely a great starting ground for players wanting to create what others will consider an "evil" character. Even I probably can't think of them all. Selfishness is the evil we all like to think of, the evil that is most often portrayed in media. Selfishness, really, is only considering your own feelings, and every action a purely selfish person makes is made in order for them to feed their own feelings. This deals with power hunger, fear, desire, and many other emotions. While the psychopath is somebody who has just plain lost his or her mind, the epitome of a character that lacks capacity for empathy is the sociopath, but for the sake of forum etiquette I'll let you guys google them and think about them if you don't know what they are.
The stupid evil
The stupid evil is when harm is done due to ignorance or thoughtlessness. A great example of a character who embraces the stupid evil is the blockhead bodyguard of a power hungry king who has undying loyalty to his king and doesn't think much about following his orders. If any of you have played Heavenly Sword, Roach is
the perfect example of this. This is the evil committed by those not smart enough to even realize that what they are doing is harmful to another person. Woe to the character who falls into the evil of stupidity.
The fictional evil
This one doesn't exist in real life. It does, however, exist in WoW. Demons are a prime example of the fictional evil. In real life, religions symbolize what it is to be evil through demons. They are possessors, killers, perverts, torturers; they are all of the things humanity dislikes. Thankfully, as far as I know, we don't have demons roaming among us the way demons sometimes do in works of fiction. WoW has Demons, Satyrs, Imps, The Scourge, Death Knights (when they used to be cold blooded killers), and more. These are characters who embrace the fictional evil, because they
are the fictional evil. Those characters who use them or associate with them, such as warlocks, are also embracing the fictional evil.
So...
if you want to play a "good" character, play a character that doesn't embrace any of these evils. Well, he or she will be good in my book at least.

A character who is selfless or thoughtful and considerate are the most agreeable characters to call "good" for most people. Characters that are innocent and naive are often unintentionally good, but innocence is easy to lose. And of course there are pacifists, who don't want to physically harm anybody. That's a good thing, right? I'm sure there are a ton of "good" qualities to have, but they'll just differ from person to person.
Intentions are the most important thing to think about when determining whether or not a character is being "evil" or being "good".