Have you found the notes left by the Survivalist? That alone is worth the money to me.

I did, and I enjoyed his story, but I find it sad that the only good part of the DLC wasn't a quest.

Well, if you do any play-through other than a Legion centered one, it's a great DLC. Then again, during the DLC you find out that Graham is becoming another Caesar, and you can choose to stop him or let him continue, so if you had a more lenient Legion character, you could choose to stop him from his path of cruelty (without killing him) and thus stop him from being any sort of threat to the Legion. He would just peacefully return to New Canaan or stay in Zion (I forget which).

I liked the scenery the most. Zion is beautiful and is the main reason I'd ever return. The quests are a bit contrived (collecting lunchboxes....really?) but the lack of siding with the White Legs makes it all a bit samey.

Also, I quite liked Stella, I wish she could have been a proper companion.

The peaceful Burned Man ending is so unsatisfying. I know it's bad for the Legion, but I always make him more vicious. It's just so nice to see the Burned Man reprise his old role!

It has no affect on the Legion in-game so I don't really have an issue with it.

The scenery.

The main characters (Chalk, Graham, Cloud, Daniel) but not by themselves. It was how they fit into the whole. Their parts really were magnified by the overall setting, scenery and story including how The Survivalist and Father in the Caves story was intertwined with The Sorrows. It was an epic story with the main characters being the most memorable.