I legit talked to Zevran more than anyone else in DAO. As soon as he was in my party I chatted him up about everything I could.

He is hilarious, sexy and he needs not only some lovin' but some loving.

Also, while he is unscrupulous, he's not Stupid Evil like Morrigan. He also has standards. He's really partial to elves and will object if you try to wipe out Zathrien's clan for the werewolves or sell the alienage elves into slavery. Otherwise though, he'll be happy to kill anyone at any time.