I am going to be totally frank: The artistry of this page is simply too amazing.
The writing, how it works with the context of the situation and the characters. A picture is worth a thousand words, and each of these panels look to be worth ten thousand words of well-written exposition.
These expressions and pictures are just SO FUN to look at, in and of themselves! They are amazing artwork regardless of context.
The panels, and the progression of the different expressions... I could look at this a two hundred times and laugh hard every time.
It also makes me LOVE the characters all the more! It extends them into deep, likeable characters more than any tragic backstory or even an entire episode of the show could accomplish.
And the backgrounds are still great, while not being over-detailed or emphasized so that they would take away from the strength of the main subject of the page. Same for stuff like Pinkie Pie and Applejack, who are secondary to RD and Twi in this scene, but in and of themselves are still beautifully drawn. It makes me feel as though your subject matter is so strong, the standard for background elements has been raised, so that you can go into more detail with them without detracting from your main subject.
I've never favourited anything before... I'm going to favourite this. If anyone I know ever needs a great artist, I'll tell them about this picture I saw, and that they should check if you're doing commissions (unless you would like me not to).
This. My god, this! XD Why haven't we seen this sort of interaction before between Twilight and Rainbow yet? xD It's totally how their relationsship is (Twilight knows damn well that her much more filled cerebrum annoys RD ^^) ((Hell it even reminds me of a friend of mine xD))