When asked why his style had changed over the years since Spiderman 2099, Rick Leonardi was nice enough to show me his thumbs, pencils, script and samples of different inkers over him over the last decade or two - and sited the inker's interpretation rather than his own style changing that may have lead to the change I referred to. I also found this in the back of a Spectre issue, which was short and helped answer some of the questions I had about how far and inker's hand goes. Specific things to watch are the city in the background, the rendering on his arm and the musculature in his shoulder, among the other things the article mentions. I also found this comparison a fun example of inking styles, since they are a similar composition and subject, but two decades apart. James Whynot did the inks and Drew Zucker did the pencils on the Aliens one. And obviously Brett Breeding and Dan Jurgens did the Doomsday one. But I've really been back and forth about how much inker's are meant to do - if they only control the look of the lines and not the placement - or do you look at inkers as "art partners" and that pencils are basically glorified thumbnails, meant to be finished out in the interest of the story and storytelling, above all else. The article does point out the difference between "finishers" and "inkers." But I'm starting to learn there is a lot of gray in between.