I would argue that there is no such thing as "normal". Some people are very passive and agree with just about anything, others are very combative/independant and will fight tooth and nail over any little thing.
What's far more important in my book is how we react. We cannot control what other people do, say or think...so we have to accept that we can only do so much. Trying to "figure" other people out or "fix" them is impossible and will only lead to frustration.