To be honest the only thing I can think of is jewellery/a watch etc.
Anything else will just be tucked away in a box somewhere.
Or what about a photo book?
We got loads of 'sentimental' gifts given to us when we got married (photo frames, corn dollies, pictures etc) It was all very sweet but it's been either boxed away or gradually filtered to charity shops. The only ones I actually look at and use are a necklace my aunt gave me on the morning of my wedding and some diamonds my husband bought me.