I only have a few Tiffany silver pieces. My absolute favorite is the small bone cuff. I generally prefer to purchase Tiffany gold and platinum pieces but the bone cuff in YG does not look good on me, the silver one fits me perfectly.
My hearts stuff. The bangle was my first branded piece of jewelry and was engraved with our anniversary date and later, the birth date of our son. Sadly, I'm convinced that my DS threw the bangle away when he was learning to walk. I had a tendency to leave it on the TV stand which was within in his reach. I got matching earrings and necklace.
The bangel was discontinued, so DH replaced it with this, which is also lovely and I wear it a lot, but not nearly as much as I did the bangle.
The 2nd runner up is the interlocking hearts on a necklace and the center one is 18 kt. I don't think they make it anymore. I like it because it does not get lost on me and stands out.