I wish I could care less about straight seams. I do consider my audience when I am quilting. My second daughter can't sew a stitch, so I didn't worry as much as I will when I get to my oldest daughter's birthday. That one sews a perfect seam and pieces perfectly.
The one I am making now is for a Cystic Fibrosis silent auction. It will be looked over at close range. I also know an accomplished quilter is making one, too. My beginner quilt needs at least to be well done.
I think it needs to be a personal thing. Whatever makes each of us feel the most comfortable.