I don’t do many road trips, I like to travel on local buses or trains when visiting a new country (and I don’t think backpacking i considered a rod trip... or is it?)
Iceland was different, driving is probably the best way to discover the country and it is part of the adventure.
If I’ll ever go back, I hope to do the full round trip and maybe a bit of the centre (central roads are open only in Summer). Iceland must be beautiful and interesting in every Season.