I'm the kind of player that likes to immerse in the playthroughs, so I try to read every dialogue and explore as much as I can. But as far as Group Dungeons go, its just not possible because you're likely to get paired up with people wanting the EXP points fast and then hasta luego, chico.

I've figured two solutions for the fellow immersive player who doesn't have any real-life friends who play ESO nor the time to make solid online friends: One, open a discussion in the Group Finder thread here on the Forums, not the one in-game, and make it clear that you're looking for people who want to run the dungeons while paying heed to the story, not just rushing. I'd personally join that kind of posse.

Or two, fire up YouTube and see walkthroughs on each dungeon. Sure, the immersive experience is broken but you can pause and read the dialogue in peace, some players even leave the whole dialogues in their videos. So long as you can see the dialogues once, you're good to go. Same goes for the little pieces of text in the dungeons that you just don't get to read.