This maybe the wrong forum... But which Credit Card miles benefit program do you guys have? Or recommend?

Delta is the most obvious, but many things wrong, big interest rate, big yearly rate, poor organization of using your free miles. And last, its Amex, many places do not accept them...

Any others you recommend? The only thing I have a good amount of miles already on Delta, So thats why im obligated to go with them.... Unless a way to transfer them to another account....

Thanks!!