I also wish to keep my dated items.
My red and green cotton...! I never made it to higher level than 21 (ish?) on any character and after getting back after almost a year I was quite disappointed with the options there are now.
I'm fond of my items and making and collecting them was a real driving force and I have lot of nostalgic feelings and good memories... My green cotton bandanas, the only things that can give me any comfort now. Velveteen ones just won't do...

In addition I wish them be tradeable! While my characters have the items I like I would really like to reset any spiritbonds every now and then by trading to lessen the possibility of losing them by accident... Also bound items are the horror.
And I may of course have more characters later and might want to borrow something nice out to them.

Currently dated things in markets are irritating (guess why I only have my dateds? Too much hassle!) but any filters available would help with this if they would be listable in markets, how ever markets would be implemented.
(I haven't been following these things, no clue if anything has been said on new market system)

...another name than Dated would not of course harm anything...