watch it again... it's a great movie!
Let's be honest, it is a good movie, but far from being great.
I would dare to say even E.T. The Extra-Terrestrial (on which this movie is almost certain inspired on) is great but there is A LOT space for even "greater greatness"
But sure, that's my opinion, and you/others have others, which (THIS) is actually GREAT! (cause we're not all "the same", hence various opinions)
Edit: I for one, consider a better movie, the one that I could re-live same emotions and experiences ("wow&wonder") each time I saw it, even if I saw it let's say just few months apart; so, "rewatchability" if I can say so, and the reliving of close to same degree of experience would make a great movie for me! As an example that come to my mind now, is from a movie that is not so much "appreciated", but EVERY SINGLE TIME I watch it, I find myself "on the tip of the couch" with my pulse risen and saying (out loud): "DAM SHARK! can't it be killed already?!?!" (no, is not Jaws, is The Shallows)