[Lila Bramble]

For me, villanis are simply this:

Someone whose views are totally different than our heroes, and in most cases, everyone else.

Because of the differences between the 'villain's' thinking and everyone else's, they usally get frustrated and frustration usually leads to anger, creating them to act 'bad.' Because they think differently, and they're in a state of anger, they might want everyone to follow thie rthinking, and want to be leaer of a nation for people to see things like him.

All in all, that's a pretty relastic way to make someone a villain.