I love a villain who has a purpose, a goal, a dream, a reason for being evil and there must be a justifications for the heroes to stop the villain such as a villain approaching his goal will cause major crisis and therefore it is justifiable enough to take him down.
I don't like to hear that villain is a villain from the start, no one is born evil, they are developed to being one.
The Joker movie is an example, sure it doesn't show his goals, but it shows why he became a villain, his life was unbearable.