Ooh, a survey! I don't really collect NTSC U games, but i'll take part in this all the same, and cross my fingers and hope for a PAL release too!
I think a CD Soundtrack and Artwork Book should be a pre-requisite in any and all LE's & CE's. This should not be an option at all, and should be a compulsory inclusion!
Not too keen on the Jewellery option, as I am not a fan of cheap imitation metal or plastic items. However, hand-crafted wood / leather costume jewellery would be acceptable. Something which looks and feels more like it was hand-made rather than mass produced by machine
Artwork Prints are always nice, especially if they are limited and numbered. The GG Accent Core Plus print was AMAZING! More of that kind of thing for sure! I'm not much of a fan of postcards though
I can't really suggest anything else at the moment though as I don't really know much about this series of games, or even what kind of genre they are. The only thing I can think of right now is a Booby Mousepad! Lol!