I used to drive faster when I was younger, but always let people in if they signaled, moved over if they flashed their beams from behind, and took turns at busy intersections during high traffic times. Generally, I follow the rules, because the rules help us predict traffic, which makes everyone safer.
Now I drive slower, but I would not say slow, and sometimes am less aware of the traffic around me I find. When you are passing everyone, you know exactly where they are. lol. Not that I am recommending it.
Also, I always signal; every change of lane or turn. I also stick to my lane when turning! In large intersections I am always amazed how people swing wide and don’t stick to their lane.