I'm upvoting this, not because I think it's a good idea, but because I want to live in a more surreal world, and having startups audition using rage comics seems like a great leap forward.
Ahh you're right. The "Sweet Jesus" face would be more appropriate for that incredible bliss. It is important to understand the subtleties.
One part that I had forgotten to talk about within the post was the fact that each face can't be lumped into a single emotive adjective.
It is the fact that the faces can mean different things depending on the context of what happened before and what happened after actually gives them more power over its written counterpart.
I'd argue it's in the subtle details of different facial arrangements that help explain why there is such a strong effect of empathy.
Awesome idea! This would benefit greatly from a "starter deck" of stock pictures collected from knowyourmeme or possibly less reputable but fresher sources.