Draklar, open minded as usual I see. :-D
Anyway, being annoying does not make you evil. It makes you annoying. I\'ve met tonnes of characters in game who identify as true good, yet are extremely annoying.
I think when judging a guild, you also have to keep in mind their philosophy. The Dark Empire, Deus ex Trucido, Twin Blades of Arete, and the Minions are all evil guilds, but in their day (or to this day) they had major philisophical differences. The Dark Empire seeks to use policy and organization to extert its will over society. Deus ex Trucido wished only to bring a constant state of pain, suffering, and misery to the world. Twin Blades of Arete sought personal perfection at any cost. Minions were a collection of like-minded people who valued comradery. There have been many more.
To me personally, what they\'ve actually done is less interesting than their mandate. If you don\'t have a well thought out personal philosophy, you\'re simply stumbling in the dark. It\'s what gives a character character.
There\'s layers to this thing too though. Necromancers for instance may see themselves as serving the cause of Good if they justify what they do by saying they rescue people from Oblivion, or they see living death as more ideal than being alive, or some such. An assassin might be considered evil by any measure if he murders innocent people, but he or she might justify it by saying he or she recognizes that the acts are evil, yet they have to be done because of some greater cause or purpose.