Evil characters can be tons of fun. Unfortuneately you have to get a bit creative if you want to be "evil" in Skyrim without just sneaking around killing unimportant NPC's. (Those DB quest get boring quickly)
I thought it would be fun to share things you have done in Skyrim that could be considered evil. One of my favs is to accept a "good" quest, but twist it to fit my character. An example would be agreeing to find Amren's sword but then smelting it down for ore when you find it ... or you could go drop it in the ocean. I just mentioned this in another thread, but my female assassin married only to appear like a regular citizen to her neighbors. Whenever she comes home she will poison her husband with Lingering Damage Stamina potions to keep him in a weakened state of torpor ... also this keeps his paws off her while she is trying to get some sleep.
Feel free to share creative ways that you have been evil with your character in Skyrim.