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Have you tried making your own mcdonald's french fries? This process was tedious, but surprisingly effective: http://aht.seriouseats.com/archives/2010/05/the-burger-lab-h... I did not have an accurate way to measure the temp of the oil, which is important. Also I reused peanut oil, fresh oil would make the color nicer and a more pure taste.
I do like their fries--though that's about the only thing. To me, McDonalds has better fries than places like In-and-Out but their burgers are far inferior.
McDonald's burgers have a unique flavor, which I like, but would not be my first choice.
In-n-Out burgers are decent, as is ShakeShack (though their cheese is salty), but my favorite burger is from Five Guys.
McDonald's french fries, however, are the undisputed king of sides.