I'm an animator, and I almost always load a file only to immediately save as so I can work in a new version. The loading and saving can both take a lot of time if I'm jumping in and out of a lot of files.
I'd love to have an option to version up on load. For example, if I'm loading a shot called "walktest_anim_v003.mb," I'd like to be able to have shotgun copy it to a new file, rename it "walktest_anim_v004.mb," let me enter a comment, and then load the new file. That would let me skip a lot of extra saving as I start work on each new version.
If that doesn't make sense for any reason, let me know.