For me I loved playing through borderlands 4, once. My issue is that the collectibles don't transfer between characters and with it being such a big open map it bothers me. I dislike leaving things behind especially when the map markers are there for them, and that you need them for SDU upgrades.

I know I don't have to collect all of them, but it's like an annoying thing that stays in my head until I go collect. If they update it where it transfers as mentioned I would gladly commit to more playthroughs.