No pictures because I'm slow, but a bottle of wine, fruits, nuts and chocolate truffles at HR Oryx Doha. Quite impressed with that hotel, and it's only a Cat 1.
Another memorable one was HP in Dubai - they literally broke into my room while I was sleeping, somehow unlatched the door guard, all to deliver a large fruit plate.
HR Lake Tahoe - the welcome gift is a coupon redeemable for one item from their convenience store. Eligible items include everything from a bag of chips to a bottle of Canvas wine.