Delta gets my local airlines vote, since I have never had any issues flying with them. No issues with the customer service, in-flight services, luggage fees, or boarding. No issues with retrieving my luggage.
Come to think of it, no issues at all, except the seating, which appears to be tailor-made for 12-year old ballerinas. Seriously, Delta, we need some generous seating on your planes, come on, take one for the team and do the right thing by everyone!