He is an old fashioned and polite demon which very rarely curses, but we see in the prequel comic, "A day in the afterlife", that Vox, (his main enemy) is the only demon in hell that can make him curse. It is also canon that he is a huge foodie and was taught to cook by his mother, who he loved dearly. He is extremely charismatic and likes to entertain, as we see in the canon episode when he sings his own version of Charlie's "Inside of every demon is a rainbow" 