How important is it to play different kinds of characters in RPGs?

I always play different character types, and think everyone should.

I like to play different character types as much as possible, but don't mind what others play.

I just play whatever feels like it'll be fun at the time and suits the game. I don't worry about whether or not its original.

I'm more comfortable with certain types and enjoy those more than new ones.

I always play the same type of character in every game.