Personally, I'm always amazed by the huge emphasis on travel with rewards cards. Obviously it's all about lifestyle, but I travel pretty much NEVER and have no desire to, so I couldn't think of a more useless way to try to redeem points, even with bonuses. Of course if the person does travel often, or wants to, then it makes sense.
My favorite feature of the Discover It card cash back is how easy it makes redemption on Amazon. I shop on Amazon all the time (LOL, I don't even want to travel to stores if I can help it
), so it's money I would be spending anyway, but this way it's like I'm getting the items for free - making it a much better option than most gift cards redemptions I could think of since Amazon has much better selection, often better prices...and yeah I don't have to leave my house. So every statement I use my Discover It rewards on my first few Amazon purchases that month. Failing that, for the Chase Freedom and my other cards, I find it hard to beat good ol' statement credits.