Kind of a fun thing is that one can experiment with gear and cadence on rollers or trainer without the bother of having to consider where one is riding. Usually I pedal my normal outdoor cadence, but I'll also do long drills at 70 cadence and biggest gear and sometimes I'll do long stints at 120 cadence in little bitty gears. Sometimes I'll do one-legged pedaling, which is almost impossible to do interestingly outdoors. A feature (not a bug) of trainers and rollers is that there are no descents and no need to slow or stop for traffic or traffic controls. I save the weird stuff for the rollers and do normal stuff outdoors.