He's a bully, he's egotistical, he has a very poor sense of humor, he constantly insults me and never thanks me for anything that I do for him, he doesn't listen, he's a violent brute with a penchant for stabbing things, he doesn't consider other people people, he drinks too much at feasts and behaves like a spoilt child when he doesn't get his way, he's inconsiderate of other people's feelings, is far too obsessed with his sword, and doesn't know how to bloody well keep his fool head out of trouble.

And he snores.

[Takes a deep breath. And yet, if anyone else ever accused Arthur of half these things Merlin would probably turn them into a newt.]