Yes, in general most of the buyers at the big agencies want ready-to-go clips, as evidenced by the thousands of sales.

But, at smaller boutique libraries more experienced buyers look for ungraded footage. I would say the demand is 100 to 1 at least for graded, finished footage though.

As for depth of field, well, whatever fits the situation. A really shallow depth of field isn't more cinematic, it's just something that started happening more and more as people started to film with DSLRs. Most real cinematic shots from films have deeper depth of field.