I would prefer exe file same as DAZ also but I voted zip files at the recent Renderosity poll. Having exe or zip files is really a much of a muchness. It's the quality of the content within that's really important.

IMO the quality control of content / file structure at Renderostity is not  on par as DAZ, therefore with zip files I can fix up the content / file structure and rezip them for archiving. Having said that the QC at DAZ is not 100% either.

If you've ever had your hard drive fail (I had 2 fail in one year) then you'll understand the pain of rebuilding your content/runtime libraries. Exe files do make it easier, but exe files with poor content / file structure are a nightmare waiting to happen.

Recently I purchased Dimension 3D Runtime Repair (on sale here at Renderosity) and it has been an enormous help to fix one of the most common errors, i.e., wrong file paths. It's not fully automatic and you have to be really careful about file association, but it's still a fantastic tool.

I think every content creator (or the QC department of content sellers) should have Runtime Repair in their toolkit so we content buyers don't have Daz Studio / Poser freak out on missing / wrong addressed files and then fix them (after market) ourselves.

IMO a lower QC for conent / file struction is Content Paradise. Often I find OBJ / OBZ files are not in a folder under the Geometries section where they rightfully belong. This is OK for Poser but for DAZ Studio it becomes a nightmare. Then again I guess CP will has a "Not tested in DS" get out of gail clause somehwere in fine print. Sigh!

BTW I think PMD files should also go into a folder under the Geometries section. The reason would become apperent if you ever rename or move a folder (that has the PMD) under the Character / Pose / Prop sections.