I'm about to do an evil playthrough as an orc character that I've made and I'm looking for suggestions. Because orcs are essentially Daedra worshippers I want to make him a loyal daedra servant. At the moment I'm planning to do the following:-

- Be mean and rude to everyone besides the Daedric Princes which he will worship. He will do all the daedric quests in the most evil possible way
- Don't do the main questline or any heroic type quests such as the companions or mages guild
- Don't accept any quests from random npcs
- Don't join the stormcloaks or the imperials, I don't want him joining anyone that he can't eventually control. I don't think a dark orc would join either
- Join the dark brotherhood and maybe thye thieve's guild but keep the skeleton key without finishing the questline
- Always choose the option that involves the most bloodshed/misery to other npcs whenever a quest comes up

Any other ideas?

Think of the Companions quest line this way....its a chance at being more powerful. You could rp the character heard a rumor about a connection between the Companions and werewolves. After playing 'good guy' for a bit you just leave the Companinos with your new powers.

You forgot the Thieves Guild.

To make your playthrough more interesting I think you should have a more nuanced form of "evil". In my personal opinion i just don't like playing or doing evil things for the sake of being evil. There has to be some reward for me or some motivation to be evil. For example, I was playing a "good" character, who still murdered grelod the kind. Why? to free the children from her evil rule and help orphans everywhere. (also, wanted to adopt runa) it's much more interesting to have motivation to do things other than just "i'm evil i kill things"