The absolutest mostest perfect sewing day would be one where the house fairies have made a visit in the night and my house sparkles (finally!); hubby at work, son at work, house guest at work; good food in frig and I actually remember to eat!, inside dogs don't need to pee or poop and don't steal my sewing chair or eat my fabric and outside dogs don't bark at everything that moves. Seams match up every time, I cut right, bobbins don't run out. Good ear candy on TV. Never-ending fresh coffee.
Now THAT would be a fun day! Oh how I wish I could afford to do that every day!