Currently a lapsed Serious gamer - due to the piping competition season I haven't been able to find time for a game for some months, but will be getting back to an (almost) weekly game next month.
Part of me would like to be Hardcore once again, but another part wonders why bother, and leans towards Casual play only.
By the definitions given, my players would be considered Casual players only, although they're probably borderline-Serious.
Now, if we factor in MMOs and the like, my players instantly shift to become Hardcore, while I see no change by virtue of never having even tried such games. (I avoid them out of fear of addiction.)