Sometimes as toy collectors, we can look across our displays and, no matter how many toys we have, only see the ones that aren't there. They are the missing figures. The characters toy companies never got around to, never thought were important enough, or worse - the figures companies felt the need to show us at comicon in the "We're Never Gonna Make These" case...
I love Ghostbusters. I'm looking forward to picking up Winston in December, and then Containment Unit and Venkman sometime next year. But, in the back of my mind, I'm holding on to some excitement. Coveting it. And Mattel is not going to get it from me until they make Real Ghostbusters toys. I think a large part of the MOTU success is that Mattel is copying the old toys. They're not trying to make Filmation accurate characters or interpret the designs in a new way (I do love my 200x, but still). They're taking toys from our youth and updating them to modern times (y'know, "like you remember").
In every property, there are characters we desperately want to see in action figure form. Characters that, if missing, will forever make our collections incomplete. But not all characters are so loved. Some you never want to see again. Some you wish you never saw in the first place. They will never grace the action figures aisles and its okay, because we never want them to. It's time for another edition of Top Ten Least Wanted! This week: Marvel Comics. 
