So alot of non-bronies always wonder, "Why do you like the show so much?" And honestly, its hard to answer, but I think I have a part of the answer at least.
Its the small details. Scenes where somepony could easily just stand quiet but instead did something interesting. For example, when Twilight first met Applejack, they shaked hands so much that Twilight kept shaking the air afterwards, then stopped by spike. Now it could end here but they decided to make spike laugh abit. THAT is what I'm talking about, Spike did not have to laught there, he could just stop Twilight from shaking and move on.
Another example is when Twilight is making a birdsnest in the Winter Wrap-Up episode. It looks horrible and Spike says "That nest needs to be condemned". Again, he didn't have to say anything, he could just be quiet.
Those small details is just one of many reasons I watch the show.
Whatta ya think?