Sometimes my system sounds great, sometimes awful


Does this happen to any of you? Sometimes I find that my system sounds great, but sometimes, with the same record, same everything, it sounds awful! It drives me nuts. Do we hear differently depending the time of day, our mood, heat, cold... other circumstances? Whenever I think I have to replace a component or trash a cable I tell myself to wait until the next day to overcome upgradetitis.
vmm
I sometimes think mine sounds great. I sometimes think it sounds not so great, but never awful.
Completely agree with you, Vmm. Have you noticed if other systems, such as your car, also sound good or bad when your main system does?