The Man of Steel (1986-) #5
I have always been torn on this one. On it’s own merit it’s a good story, but as far as being a defining moment in Superman’s life, it never quite felt like one. Yeah, obviously this was the first appearance to the post-crisis Bizarro, but he didn’t appear again for a long, long time. And when he did it was basically more like the traditional Bizarro. So it really didn’t feel like a monumental moment the others did.
Again, wasn’t a bad issue, just seems it would have been written as an issue of the regular Superman series then part of Man of Steel.