Here in the norther hemisphere today is the longest day of the year. To celebrate I went out for an early morning 60 mile ride. I ended up riding about 28 miles of it on a concrete road with expansion joints. I now offically hate concrete roads with expansion joints. It seems as if every 0.05 seconds you get a jolt from the expansion joint. Not especially harsh, but rhythm of it is never ending and very, very annoying! This experience got me to thinking about my favorite riding surface. I'll take new (less than five years old) blacktop any day of the year. Not enough O's in smooooooth to describe good blacktop. What about the rest of you? What's your choice when it comes to the surface on which your two wheels make contact?