As you can already tell, I'm a huge fan of the Turtles. Especially the characters of Raphael and Mikey.
To me, Raphael represents someone who is the most realistic. Being an outcast, fighting for your life day by day, living in disease-infested sewers, your family never being able to find love/outside friendship...who Wouldn't be mad about that?
And Mikey is the yang to Raphael's yin...both push and pull, but yet both fit together well. One is strong when the other is afraid, while the other is comforting when the other needs it.
Thus why the Raph/Mikey pairing has always been my favorite.
And I do have a fanfiction account now (well a 2nd one) here:
www.fanfiction.net/u/4842960/