I'm shocking myself to be saying this, but as the weather has cooled down here this year, I realize that I really prefer the 100-110 days. I've learned how to manage the hot temps, and I don't like the hassle of extra clothing. I don't event want to need long sleeves. Plus, I want to sweat when I ride. Not just a little, but pore-cleansing buckets. Above 110 is abusive, but the 100-110 range (and low humidity) works out fine. Right around 100 here is great riding weather.