"I love the Power Glove. It's so bad." - Lucas, from The Wizard (1989)
That line/scene should be enough reason for anyone to love this movie, but as a kid growing up, loving the NES (Nintendo Entertainment System - and I still do love it), I always wished I was the one partaking in this adventure. I've always had a "wanderlust", I think, so this movie also appealed to that part of me that has always wished I could just run away, and go on an adventure.
Movies that I probably shouldn't like ("chick flicks", children's movies, etc.), and/or aren't all that great, but I still get some enjoyment out of for some reason, and that I'm a little embarrassed/ashamed to admit to enjoying on some level.
I may or may not attempt to elaborate on what I enjoy about them.