The way some people change when they get behind the wheel is fascinating to me. I think there have been documentaries on it. How some completely placid and gentle people turn into raging terrors when driving.
I have a reasonably powerful car and I don't generally overtake to get somewhere quicker. I overtake someone going too slowly because they are going too slowly and it's boring.
Also it's just fun to overtake when safe and I only overtake when the road ahead is clear so I'm warranted in doing it.