Another happy Capital One cardholder here!
We get 1.5% cash back on all purchases. Just bought a boat hoist with it. <img src="http://www.traveltalkonline.com/forums/images/graemlins/Grin.gif" alt="" /> And as everyone has said, no foreign transaction fees. Great customer service - I get a live person whenever I call.
Used to use the Delta Amex but stopped because it's not accepted everywhere. Husband flies Delta for work/business on a weekly basis so we've got the FF miles covered that way.