Describe what you consider your ideal biking conditions. I don't want to hear: 60 deg, slightly overcast, downhill with the wind at my back, brand new paved road with no cars and a gaggle of hot babes waiting at the next stop with cold beer and a massage...ect.
For me, a ride is not complete without a few good tough hills, and I do like a few good downhills. I like warmer weather and I don't care if it rains. Most of all I like biking with others.