I also have decided that Patrick is fiercely loyal to friends, so I make a note of this as well. Next adventure, Patrick lends another helping hand to the player character he is keeping the box for, and the two become good friends. I make note of this. Now, whenever I play Patrick in an adventure I can keep him consistent, and believable. He will become a real person to the players, and not just an image on a computer screen.
Villains come in all shapes and sizes.
It s easy to make a tough villain, but tough does not really make them memorable or frightening. You should strive to make your villains really come alive. One good thing to remember when making a new villain is that they all have goals, and it is often these goals that make them seem evil. As an example, you might have a villain who believes that humans should bow down and worship all Vampires. He is not necessarily completely evil, he simply believes that Vampires have hid in the darkness long enough, and now it is time for them to take their rightful place.