What is the best airline miles credit card?

Samantha: What is the best airline miles credit card?
I know the commercials say that capital one has the best airline miles credit card, but I’d just like to hear from “real people” what their opinions are. I usually fly whatever airline is cheapest, so I’d rather not get a credit card through an airline unless they have a great deal. Thank you for your help.

Answers and Views:

Answer by Huntsman
I have read article after article that states you are better off with a 1% cash back card.
(more profitable for you)
Consider airline miles cards gimmicks.
They never amount to more than 1% cash back.
You must spend thousands, possibly years to accumulate enough for a trip.
There are fees. Including, if you want to add an extra person.
You can’t get the discounts you will see in sites like travelocity.
Please talk to anyone that has tried to redeem them – it’s a nightmare.

Whenever you fly sign up with them. Ex; Delta Sky Miles
If you fly with them enough, you may be a first class upgrade every once in a while.
Do your homework – don’t get taken