I only have a couple of long sleeve jerseys. One is wool and the other is regular cycling material. I have found that jackets just don't breathe, so I tend to wear a jacket only when it's really cold, raining or on a long descent.

I wear the wool jersey when it's warm enough for a single layer and not likely to warm up much. I wear the other jersey with a bolero over it, when it's a cold morning but likely to get warmer, but not so warm that I want short sleeves.

V.