Cosmic Plaything: Zig-zags. Usually, fate would be cruel to him just to move the plot forward.
Crazy-Prepared: An odd presentation. Dan has evacuation plans and various keys (some obtained via questionable means) stashed in various places. In spite of this, his revenge plans are often ill-formed, to the point that he forgot the drill he needed to drill into a bank's vault.
Even Evil Has Standards: Dan never resorts to homicide in his plans and is disgusted with Chris whenever he suggests it as a logical extension to Dan's current scheme.
Its a bit zigzagged on the murder part, as even as early as the pilot, Dan occasionally does plan to kill someone. He's just disturbed when Chris suggests it.
Dan's also rather shocked when Chris admits that he'd kill for bacon.
And refuses to collaborate with Elise's parents in getting back at Chris, because he doesn't trust "people who'd bump off their own son-in-law." That's not what their plan entailed; they've just indicated that they'd be willing to.
He also admits he finds himself frightening at times in 'The Boss'. "Some of the things I say are disturbing, even to me! Especially to me."
He also turns on his boss immediately when she demands that they kill Chris to cover up the fact that she's a demon despite the fact that Dan had been making good money, enjoyed working with her, and was excited about his long-term future if he continued to do so. Earlier in the episode, he was willing to fire Chris for these same reasons, but he drew a line without any second thoughts when he heard what the boss was asking for.
Hidden Depths: Has a surprising knowledge of Shakespeare and a somewhat eclectic collection of other topics.
Hidden Heart of Gold: He genuinly loves his cat, he has a soft spot towards Christmas and anyone who besmirches the image of Santa Clause will incur his wrath and deep (DEEP) down, he cares about Chris.
Smarter Than You Look: Dan is well versed in Shakespeare's works, even naming his teddy bear Brutus. In "Dan vs. George Washington", it is pointed out that Dan's knowledge can be very intricate, but random. For example when asked who carved Mount Rushmore, he gave the correct name immediately without even thinking about it, as well as the fact that his son had to complete it. However, when asked which U.S. state Mount Rushmore was in, Dan threw out a random guess, Ecuador.
Bacon Addiction: Shows up a couple times. In "The Gym" he admits he'd kill to be able to eat bacon in his own home again, something that even Dan finds unnerving. "The Mechanic" reveals that he keeps emergency bacon strips in his wallet.
Big Eater: So much so, that when Dan tried to give him motivation into chasing someone by telling him to pretend they were a sandwich, he stops to ask what kind of sandwich. Implied in "Anger Management" to be brought on by his repressed anger at everything life does to him.
Butt Monkey: Forced into Dan or Elise's antics, hated by Elise's parents, generally gets punished for Dan's punishments; he's this to a T.
Catch Phrase: "Dan, you have done a LOT of questionable things..."
Chris' wife, who doesn't like it when her husband gets involved in Dan's shenanigans, but accepts that he does not have the backbone to turn him down. She's secretly an agent undercover when she's not around the two's antics.
Anti-Hero: Starts off as Type 5 AT BEST in the pilot, then drops to about Type 3 throughout the rest of the series. (So far...)
"Well Done, Daughter" Gal: Claims that she was like this as a teenager, but has since grown out of it. If her obsession with making everything perfect whenever her parents visit is any indication, she really hasn't.
Women Are Wiser: Usually played straight, but occasionally subverted. See Not So Above It All.