Much of the conflict arises because Luna doesn't understand modern social cues and Twilight is the only one willing to bridge that gap.
Dressed as Star Swirl the Bearded (an obscure historical figure no one recognizes). Pinkie Pie: Dressed as a roasted chicken. [S2E4] Luna Eclipsed
The citizens of Ponyville struggle to see Luna as anything other than the "Mare in the Moon," showing how difficult it is to shake a bad reputation. Much of the conflict arises because Luna doesn't