What are these aspects that you don't like?
1: The characterization of Luthor as the insane, solely petty jealousy driven mad scientist. I personally prefer the machiavellian business tycoon/legitimately respected scientist who has many noble intentions but very ignoble means and a pathological distrust of superhumans and aliens, mainly because that's the Luthor I grew up with and I'm rather drawn to the idea that the biggest villain in the DCU is a man who truly wants to do right by the world, but his own shortcomings and flaws twist and corrupt that desire to do good into something nasty.
2: I got the vibe from All-Star that they were going for the idea that Superman is who he really is and the Clark Kent we see day to day is just an act. I'm not fond of that for too reasons. One, the Superman stuff I've always found most appealing are the quiet dialogue driven moments between Clark and Lois or Clark and Jimmy or Clark and Perry or Clark and Lana or Clark and his parents. That's purely a matter of personal preference. I mean, my favorite scene in Jurassic Park is when John Hammond and Dr. Sattler are talking about the Flea Circus, so I guess I'm just into that stuff. Two, it's always struck me as kind of silly and unnecessary. We all wear masks, we all play different roles in different groups. I know that I'm a very different person in my church than I am at school simply because my relationships with those two groups of people are very different. No one "version" of you is the real you. They're all different aspects of the incredibly multi faceted being that is you. Obviously Clark plays up on the differences for the sake of the whole secret identity thing, but I think that whatever aspects of his day to day life as Clark Kent are his being a lie, there should be an equal amount of lie living when he's Superman. Not that either is him living a lie, but he plays up certain traits and downplays others for the sake of his secret identity, and as Superman having the inspiring persona he wants to project. I would think the "real" Clark Kent is somewhere in the middle, not quite as confident and larger than life as he likes to let on as Superman, but not quite as quiet and unassuming as the Clark Kent that the average joe who doesn't really know him sees. I think the best way to approach Superman is as a very multi faceted being, but a lot of people tack onto the "No, Clark is a lie he lives" idea, which is the vibe I got from All-Star.
3: The power levels. Again, this is probably a matter of what I grew up with, but I prefer a Superman who sometimes struggles to get things done. Not that he should be a weakling street level skull basher. He should be one of the more powerful characters in the DCU who isn't a god of some kind. But moving planets, flying faster than light, being able to sneeze galaxies out of existence....not my cup of tea. I prefer it scaled back a bit. I think a big part of it is that I really dislike Kryptonite. It just annoys me when you have a character who is completely invulnerable and practically immortal and can only be killed by this one green rock that's supposedly rare, but you always have to have someone get their hands on some if you want them to pose any kind of threat, and have you noticed that the one thing that can kill him never actually manages to kill him? Yeah, not a huge fan of Kryptonite. So, I personally prefer a Superman where you don't need Kryptonite for him to be in danger. not that he shouldn't be faster than a a speeding bullet, more powerful than a locomotive, and all that good stuff, but I'm not a fan of him being so powerful that he needs to get into a three way fist fight with Jesus Christ, Cthullu, and Hercules just to break a sweat.
Now, Morrison did those things absolutely brilliantly. They're just not my favorite things to begin with.