Great Question!
I have always enjoyed soft-cover vacuums MUCH better than hard-covers. It gives the vacuums more personalty. BUT, some soft-cover bag shapes I don't like. shake-out Sanitaire bags I don't like. I like a square look of F&G bags much better. I also don't enjoy the non-deluxe Elite bags, but I love the deluxe top-fill bag. The Oreck also doesn't have that feel too. Anyway, before I bore you, I like the bags in the back better. But I only like F&G like bags. The C bags are too small and A bags I can see the fill tube, and it doesn't seem complete.
I'm getting too in to this! But yes, I enjoy soft cover bags better, and I prefer them in the back, although I do love them in the front too.