The Missing Piece

I saw this brilliantly tragic image in an online forum the other day:

Awwwww!

I
apologize that I don’t know the source of the image or its creator, but
it made me realize what an apt metaphor the missing puzzle piece can
be. Even if you simplify the concept, it can be quite effective. So I
made my own missing-puzzle-piece gallery:

That last one was too obvious wasn’t it? Damn, why do I always have to go for the cheap and easy!? Shame on me!