Definitely read all text, no matter how insignificant it might be.Of course daily beastmen quests and leves I kind of skip eventually after enough repeats, but as a general rule, I read all text regardless of what it is, as I'm crazy like that.

Not to mention I screencap all of it too, a habit I started in FFXI, as I've kind of made it a little project of mine to compile screenshots of quests and dialogue into a coherent narrative at a later date.