FWIW I did use the same exact character back on Scht so it's certainly possible we did some runs together. I also played a lot as a support FOmarl back then. And while I genuinely appreciate the offer, I enjoy the hunt so if I'm getting it back I'll get it back the old fashion way.
Beyond that I can't say there was *too* much more that I really held all that dear. There was a nice plus hit Vivienne I had on said FOmarl which also stings a bit because god she's so blind. Other than that, not too much really special that I remember. Had a TJS (first one I ever actually found) I had sphered up to 0/100/100/0, so that's more "ugh time investment" than "was actually a great TJS" and a Heaven's Punisher (which I want to say I think I vaguely recall I ended up merging into Millies? Maybe?) and a single Syncesta that were more both "hey I actually found one" than any real value. Most of it's just stuff, and chasing it's a big chunk of the fun, so all good.
But I'm still getting my feet wet so I'm looking forward to seeing all of the events and other special stuff - I cannot overstate how oh so very much I love the quality of life improvements -- the item shop actually consistently selling everything, the HP meters for the mobs (this is so intuitive I actually started second guessing myself if it was there on the vanillia BB client lol), the personal drops and fix to the XP system, etc. Really modernizes the game in a great way while not utterly breaking/changing it.