Originally Posted by LittleBigMan
I get a kick out of riding fast downhill, but my better judgement tells me that going slowly on a bike (10 mph. to 25 mph.) is one thing that makes it safer. I think there's more to be gained safety-wise by going slower than traffic than there is to be gained by trying to keep pace. Let those motorists get past me and out of my way. 
Got that right!
Of course fast is fun in the right place. There's a super long gradual hill with wide lanes and almost no traffic or parked cars. I love to top out my gears going down, then turn around and chug up the hill, then turn around and fly down again. I could do this all afternoon--a real fun way to do interval training! (It doesn't take much to amuse me.)