Most favored gifts increase your relationship dramatically. Good gifts will still make them happy but with small-average increase with your relationship. Other gifts not on the list wont make any changes.

Most favored gifts:
Glass Vase
Brand Bag

Good Gifts:
Red Pine Bonsai
Mini Cactus
Brand Purse
Brand Watch
Teddy Bear
Japanese Doll
Kaleidoscope
Book Cover
Ganesha Bank