I have to wholeheartedly disagree.
Fairy Tail has no story line. It has random arcs, and it is going nowhere. It's a dead-end of a series.
Natsu's goal/dream was to find Igneel, when did he ever pursue it really. It's like a sitcom with no real story line, that you only watch for the laughs, it's fanservice. Compare that to Naruto, which has a real story line, and character development. Just because the author of Naruto doesn't give the readers exactly what they want, doesn't mean it's a worse series than a series created by someone who gives viewers exactly what they want.
Most of the arcs in Fairy Tail I just watch, and forget about as soon as a new arc starts. There's no memorable story in it, no memorable arcs. I've followed Fairy Tail ever since the manga was at 20 chapters ( waaay before the anime even started), and I cannot list almost any of the arcs chronologically.
Naruto I can probably list 95% of the arcs, because it had good story line behind it, and it stuck in my head, where as in Fairy Tail it's just simple enjoyment. It's entertaining, but it lacks depth and real story.
I really enjoy reading Fairy Tail because it's entertaining, but cool fights and strong characters, if that is all you are looking in a series, you've misunderstood the whole concept of a story.
It's like wanting to marry a chick just for her 10/10 looks. She's great in bed and all, and she keeps you sexually satisfied, but she's no marriage material, she can't cook, has horrible personality(2/10) and a shopping and drinking addiction and father-daughter issues.
While Naruto is more like 7/10 looks and 9/10 personality, 9/10 marriage material.