Depends on what I'm reading, like if its a modified cupcakes song like sandviches I'll usually read it in heavy's voice (if you don't know who he is, just think of a moderate to severe case of Russian accent). Or if I've heard the character before it'll be in their voice, if I haven't then it could be in RD's, Fluttershy's, Twilight's, Rarity's, AJ's, or Pinkie's voice. And I since i live in the south i also speak like Applejack (just not as thick an accent)
Kinda like your profile pic