Ok, this is a bit ambitious, but I have faith in us :) Red is always described as being the colour of passions. Eg. they were the mirrans most resistant to the phyrexians, despite often being seen as a "mean" colour with RB evil creatures and RG brutish creatures.

Can you design a card appropriate to an emotion other than "graaaaa! burn!"? Love? Passion for learning? Determination? Joy? It can either be a flavourful vorthos card, or an abstract Melvin "this card/mechanic feels 'nice' when someone plays it."

I had come up with Bond of Love a while back.

I made Compassionate Teachings. Also, does Lover's Rejection count?

I also made (((Anticlimax))), but I don't know how well it fits this challenge.

Added Fiero to the mix. Which brings up an odd point... Blue and (for some reason) Green have gotten Breakthrough, Stroke of Genius and Eureka... moments of extreme passion, that would probably be best expressed by red... I think the big problem with "red's supposed to be about passion, but just comes off as angry" is because the other colors steal what should be red dramatic emotion. Nihilistic Glee? Swell of Courage? Thirst for Knowledge? Vitalize? I'm not saying that the other colors shouldn't show any emotion, but those words should be allowed to be red, as much as they are black, white, blue and green.

­Humongous Surge
­Monomania

­Mass Confusion seems pretty , since it's the color of chaos, so the emotion of confusion fits right in. And I think this actually would be playable in limited as a reasonable finisher, too :) I also made an uncommon enchantment in Daze of Confusion that is a similar type of effect, enjoy :)

Just looking down a list of emotions, it's interesting how many are already Magic cards, mostly nonred: Contempt, Curiosity, Dread, Fear, Hatred, Terror, Wonder... about the only red ones are Impatience (and Shock :P ;))

I created Liveliness and Playful Puppy so far. I may create some more.

I created I Can Has Meckanics?. I'm going to blame Alex's Playful Puppy for this one.

­Obsession