I think, like in most runs, everyone has a part (or issues) that they like more than others. Doesn't mean the other issues aren't any good. Everyone's got an opinion, and I think that kind of discourse is what these boards are supposed to be about.
I think Miller had a big hand in page layouts from very early on in the series. The noir look, the story board layout didn't show up in other McKenzie books that I'm aware of. I think McKenzie started moving DD toward the darker look (likely from his horror background), and Miller had a pretty open hand with the artwork. I think it was the stories and the new, different look of DD that got people excited about the run.
Personally, for me, it's the Kingpin issues that had the most impact. A hero is defined by their villains. For years, DD had goofy villains. The creation of Elektra was great, and the fact that she still is around and a vital part of the universe is testament to the brilliance in her creation. But, 168 isn't my favorite issue. I think that's ok, right? I really like the Kingpin issues, but does that mean I don't love issue 163 where DD "battled" the Hulk? No. I love that issue too.
Luckily, there are plenty of memories to go around.
Ron