Old World Blues is the best New Vegas DLC, the others aren't the best for their respective games so imo it's OWB.

OWB > Zeta > .... .... .... .... > Nuka World

Two complete well made DLC vs half a DLC that was solely designed to appease whiners, tough call

Old world blues is my favorite! And I actually enjoyed Mothership Zeta, I know a lot of people don't like it. I've never played Nuka World so can't say on that.

Mothership Zeta is superb, and Old World Blues probably is, I haven't played it.

Nuka World... Ehh... What it has is good, but it's a bit lacking.

OWB > every other Fallout DLC

(opinion, of course)

OWB. Because MENTATS

I like Zeta best of these but I cant deny OWB is best of these

I chose these three because I thought these were probably the best from each game (haven't actually seen all fallout 3 DLC's so I'm not sure if zeta is the best one.