I very rarely now buy a pattern and fabric together. I get Sew Today and am often swayed to buy a pattern because it looks so good in the fabric. Unfortunately because it's American the fabric can't be bought here. Consequently like you, I buy patterns that are now in boxes.
I have now become a fabric and patternaholic. Consequently not only do have a large pattern collection, but a huge stash of fabric. I tend to buy in lengths, i.e. 2mtrs for a top, 1.5mtrs for trousers, 2.5-3mtrs for a dress etc.
The logical thing would therefore be for me now to match a new pattern with fabric I already have..... no I still buy fabric on impulse
. That's why this thread made me think and I draped the fabric on my dress form and put the pattern against it, as I could see better the fabric unfolded,I then took a photo as a reminder. To be honest when I started this exercise I found fabric I'd forgotten I had