After seeing the results of not ironing before cutting for a rag quilt, I do iron everything before cutting it - and yes, I also iron out the crease from the bolt and re-align the fabric to get a straight edge.
I spent this weekend prepping fabrics for the next three quilt projects. I ran out of steam before ironing the last three fabrics for project number 4.
Now I can concentrate on the more fun stuff.
Cheers, K