I'm a night person too, and really looking forward to the light after work to start riding during the week again (outdoors). I don't mind the trainer, but it isn't the same.

I definitely notice the cranky irritable restless bit too. But that could be due to the massive snow/ice storm we had last weekend that is covering up the roads.

She Cycles by the Seashore
http://knitseashore.typepad.com/she_cycles/