Paved or Unpaved?

What's your preference?  A paved (sealed) road or unpaved (gravel) road?

Somewhere in Tanzania (BigSky Adventures)

I was recently reading The Hubb forum and these two contrasting posts caught my eye.
The first post was requesting information on a route from London to Cape Town, with as little paved roads as possible.

Unpaved Roads

 The post below, was rather more hesitant and preferred paved roads from Germany to South Africa.

Paved Roads

Personally, I prefer gravel roads.  The World Bank has data on the percentage of paved roads each country has.

Roads, paved (% of total roads)

Data from World Bank

Feel free to add your thoughts on the Hubb forum.