I was also struck by how he’s kind of a jerk (and yes, I’m familiar with http://www.superdickery.com/) – he throws people around, plays mind games and effectively tortures them for information. Try not to think about the uncomfortable implications of drugging a college student, and then letting him be kidnapped, to pose as him in a football game (another fairly low-scale crime to fight). He uses really weird methods to get results, like tricking rich people into a mine and triggering a collapse or convincing a munitions manufacturer to enlist in the army. While seemingly effective, they’re pretty convoluted schemes.
Overall, classic Superman is certainly very different from modern Superman. He seems pretty unguided. It also took me a little while to adjust to the art style – the lack of details, for example, made it sometimes hard to tell who I was looking at (unless it was Superman, since his costume is kind of a giveaway). Additionally, the bright, garish colors were pretty jarring at first (green water? What a world!) but by the end of the first series I was more or less adjusted. Still, the sparse details and disco colors made it harder for me to really focus on the artwork, and I found myself revisiting a lot of pages to reexamine the artwork.