Debian – Find Packages Installed Due to Recommendations or Suggestions

No.

Unfortunately, RPM-based package management has just one type of dependencies. It's a dependency or it's not, not something in between (read here). In my experience, dependencies in Fedora are quite limited and non-core functionality is not installed unless you do group-installs.

The multiple levels of dependencies shows one of the powers of DEB-based package management, in my opinion.

I don't know of a one-stop command line solution, although all the tools exist (apt-cache depends --installed, apt-cache rdepends --installed --recurse, apt-mark showmanual, dpigs, etc.). It would be possible to hack together a command line script that could attempt to find large packages with few manually installed reverse dependencies. Here's the proof of concept I used as a starting point:

dpigs | awk 'NR == 1 {print $2}' | xargs apt-cache rdepends --installed --important --recurse | awk '!/:/ {print $1}' | sort -u

On the other hand, if you want to do complex analysis of the graph in multiple directions (e.g., what set of manually installed packages has the largest on-disk overlapping set of recursive dependencies), it can quickly get out of hand. At that point, you'll probably need to look at something more customizable (awk or python?).

Full Disclosure: I have contributed to the project below. If that kind of thing matters to you, please take it into account. If I were aware of a similar project that were already in the Debian repositories, I would probably post that instead.

While I prefer to do everything from the command line, you might find pacgraph (also on github) a useful alternative. It was originally written by Kyle Keen for Arch Linux, but it's now compatible with deb- and rpm- based systems as well. I used to have some sample output from an Ubuntu system, but I can't find it, so here's an example from his web site:

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It's been a while since I've used it, but I believe there are also flags to highlight a particular package, with different colors for its recursive dependencies and reverse dependencies.