I guess I am just not sufficiently discriminating, but I had a great time at SFNE when I went.
It's also worth pointing out that an amusement park is not a theme park. They have many elements in common, and there are some that straddle the boundary (SF Fiesta Texas comes to mind), but they are not trying to be the same thing.
I happen to like amusement parks and theme parks. I'm an equal-opportunity fun seeker. And when it comes to amusement parks, SFNE has a pretty good lineup. Superman, in particular, is fantastic. That drop into the tunnel is a thing!