The effect of traffic roundabouts on driver attitudes

Had an idea on the way to work this morning. Traffic roundabouts are training drivers to be more opportunistic and proactive in contrast with traffic lights which train drivers to be passive and rules bound. (Also frustrated due to the lack of control and self determination)

I wonder what effect this has on their satisfaction with life beyond the road?

The perception of control is also interesting, in that generally  (on a flat roundabout) you can see everyone and know where you are up to in getting to where you are going. While with traffic lights, you never quite know if you are getting a fair deal.

Moving on...