What? I think they all fit pretty well here are my reasons.
Rarity is narcissistic and likes herself too much over others. (Me gusta)
FS, PP, and TP all represent their common facial expressions.
Rainbow Dash is totally a troll lol.
And Applejack is always up for a challenge
Oh nevermind I see what you mean. Yeah it was hard to get the faces right because I didn't want to distort them lol