This is interesting from the perspective that 1) I do rename all of the files once downloaded, and 2) I was one of the members who helped rebuild the old GAC site (post Yoc) when it experienced an catastrophic melt-down. One of the massive hassles of that effort included a heap of files (thousands, all in one directory) with unidentifyable names. You had to open each one, ID it, rename it, then re-upload it into the appropriate directory. I don't know enough about DCM to know that there is any risk of that, but, what a mess GAC had!!
I do echo the comments about the difficulties of trying to establish a standard, and the efforts that it would take to rename the files to conform once you had it.
But, just for grins, what are some of your personal naming formats? I always look for my books to naturally sort to the order in which they were published, so use the following format:
YYYY-MM_TITLE (v#) iss# [page count] Poster.cbz
With the page count, it will either be [c2c 36p] or [56 of 68p]. This way, I will know if upgrades come out. If it is a fiche scan, the issue # will be followed by an "F". I haven't worked out a good method of handling mixed paper/fiche files.
I would be interested in hearing other takes. I know some folks put the publisher in there as well.