I've driven over a thousand miles in the last three years in the british isles, and I really like roundabouts. I also drive in Carmel IN several times a year, and roundabouts here are a whole different ballgame. The British isles have roads that are small and terrain that makes them not arrow straight (like in Carmel). Many british roads are only one lane with "passing places". These passing place roads would kill american drivers. So it seems that the British citizenry seem to understand that the road is not "theirs" and everybody is in this together. So there is a sense of cooperation.
The Carmel roundabouts are driven by people who are used to lanes that are 30 feet wide, and who have a sense of entitlement that their Yukon Denali is here now, and everybody better get out of the way. Then you throw in a mix of confused drivers and aggressive drivers, and the Carmel roundabouts aren't as enjoyable as the british ones.
But honestly, Must things suck in America compared to the british isles.
Don't get me started about the lack of proper transmissions here in the states; we apparently think our cars should be golf carts.
Sheldon