I am putting this info in a thread separate from the general Tips on Socializing, which is now mostly spoiler-free. This is info that normally you get at Associate and Buddy level with the residents of Portia.
(SPOILERS)Black Book v3.71
This is a work in progress.
People whom you may marry are listed in
RED.
GIFTING:
With a few exceptions: Bouquets of Wildflowers +4, of Asteria +6, of Roses +8 (these may have been lowered by 2 in v4.0)
Many like gems (topaz, sapphire, etc) but I don't gift these.
Day of Bright Sun 
: All gifts are 3x normal value.
Aadit: (will not spar without Fair Fight skill.) Resin +4, Hardwood +4, Hardwood Plank +6, Talisman +10. Dislikes Wildflowers, Tail Feather -2
Ack: Milk, Old Parts, Power Stone, Simple Circuits +4
Albert: Juice +4, Power Stone +6, Talisman +8. Dislikes Wood, Stone, Hardwood, Wildflowers -2, Copper Ore -10
Alice: Bamboo Papaya, Pumpkin Rainbow Flower +4, Bamboo Papaya w/ Egg-on-top +8, Crystal Necklace +20. Dislikes Snake Berry, Animal Feces -5.
Antoine: (crush on Dr Xu) Power Stone +3, Milk, Shell +4, Crystal +6, Perfume (untested), Small Satchel +30. Dislikes Wildflower, Wood -2, Copper Ore, Bug Egg -5
Arlo: Power Stone +3, Spaghetti w/ Hot Sauce +6, Spicy Stew Mix +8, All swords, Rusty Iron Pipe +10. Dislikes Wildflowers -2, Copper Ore, Salad Sauce -5.
Carol: Colorful Fur, Fiber Cloth +4
Dawa:
Django: Cheap Soda +4, Bronze Sword +8. Dislikes Lemon Juice, Tin Ore -5
Dolly:
Dr. Xu: Herb, Bandage, Venom +4, Herbal Mixture, Simple Ointment +6, Talisman +8, Meat and Mushroom Stew +10.
Emily: Egg +4, Pumpkin Pie, Pumpkin Steamed Rice +10, Busy Farm (book) +15, wants a telescope. Dislikes all fish -2, Wildflowers, Feces, all blades -5.
Gale:
Ginger: (no reward/penalty from other normal gifts) Umbrella, Wooden Basket, Silk Scarf, Lemon Juice +2, Journey to the East (book) +3. Dislikes Wildflowers, Milk, Venom -2.
Gust: Apples +4, Umbrella +8. Dislikes Wood -5, Wildflowers -5
Higgins: None
Isaac:
Jack:
Lee:
Liuwa: Sunglasses +8
Lucy: things that the school children would like, Balloon +8, Crystal Necklace +20.
Mars: crafting parts (unspecified), Copper Bar, Bronze Bar +4
Martha: different kinds of bread (unspecified), Baked Bread +8. Dislikes herbal medicine (unspecified), Herbs -5.
McDonald:
Mei: Power Stone +3, Asteria +4, Roses +6. Dislikes Sand, Wildflowers -2.
Merlin: sturdy crafting materials (unspecified). Dislikes clocks.
Molly:
Nora: fruit (unspecified), exquisite things with fine details (unspecified) Lemon Juice, Spaghetti w/ Hot Sauce +10. Dislikes Grilled Catfish, Sand -2, Copper Ore -5.
Oaks: crafting materials (unspecified), Snake Berry, Meat +4, Apple Juice, Roasted Meat +6, Meat and Mushroom Stew +10. Dislikes Feces, Caterpillar, Venom -5.
Papa Bear: Meat +4, Aroma Apples +10
Paulie: Dislikes clocks.
Petra: Relics (unspecified) Crystal +4, Power Stone, Lemon Juice +10. Dislikes Wildflowers, Sand -2, Copper Ore -5.
Phyllis: Herbal Mixture, Bandage +4, Simple Ointment, Power Stone +6, Seafood Noodles +10, Yellow Sapphire Necklace +30 (recipe from Ginger at friend level). Dislikes Stone, Wildflowers, Venom -2.
Pinky: (as of v4.0) likes catfish, golden salmon +4, premium and other fish +6, wise fish +10. Will become your pet.
Polly:
Presley: hot tea (unspecified)
Qiwa: Any fish +4, Grilled Catfish +6, Wise Fish +10.
QQ: Apples +4
Remington: exceptional weapons and shoes (unspecified), Power Stone +4, Lemon Juice +10. Dislikes Stone, Wildflowers -2, Egg, Copper Ore -5.
Russo: Eyeglasses +4
Sam: adventuring gear (unspecified), Power Stone +3. Dislikes girly things. Stone, Wildflowers -2, Copper Ore -5.
Sonia: money, rich guys (has a crush on Gust), beautiful bags, expensive jewelry. Shell Necklace, Power Stone +4, Small Satchel, Yellow Sapphire Necklace +30
Sophie:
Toby: Anything Apple +4, Aroma Apple +12, Bat Mask +20
Tody: (crush on Emily) Dislikes Pot of Flowers
DINING:
Note: for food descriptions, the wording is specific -- "smoked" is not the same as "grilled", and "spicy" is not the same as "hot" in regard to preferences or dislikes. The menu changes, and I don't know the frequency. There may be a specific menu for each day of the week, or it may be a random daily selection. Portia Hot Pot is both Hot and Spicy. If they say they want a particular dish, that takes precedence over their normal likes/dislikes. Use preferences to fill out unspecified portions of the meal. 6 items seems to be optimal, and you may order more than one thing from a section to "add in favorites."Albert: Likes hot and spicy only. Dislikes ice cream.
Alice: Likes Bamboo Papaya w/ Egg-on-Top. Dislikes sweets.
Antoine: Likes Bamboo Papaya w/ Egg-on-Top, likes veggies.
Arlo: Likes Spaghetti w/ Hot Sauce, likes noodles. Dislikes sweets (any dessert), dislikes Steamed Potato Fruit.
Emily: Likes Pumpkin Steamed Rice, Highwind Fried Rice, Stewed Rice Meat Supreme, Potato Fruit Cake, likes vegetables, likes rice, loves salads, loves Pumpkin Pie. Dislikes any fish, dislikes coffee, dislikes noodles.
Lucy: Likes Coffee. Dislikes meat (vegetarian)
Mars: Dislikes spicy.
Martha: Likes Baked Rice w/ Coconut Chicken. Dislikes Red Tea.
Mei: Likes ice cream. Dislikes raw veggies.
Merlin: Dislikes rice.
Nora: Likes Sauteed Sweet and Sour Tenderloin, likes Rainbow Lemonade. Dislikes Holly Tea, dislikes coffee, dislikes any fish.
Oaks: Dislikes Holly Tea, dislikes bitter.
Paulie: Likes hot and spicy. Dislikes tea.
Petra: Likes Rainbow Lemonade. Dislikes meat, dislikes salty.
Phyllis: Likes Milk Scented Tea, likes dessert. Dislikes smoked food, dislikes spicy food, dislikes rice.
Presley: Likes Red Tea, likes seafood. Disikes smoked food.
Remington: Likes Sauteed Sweet and Sour Tenderloin, likes hot, likes spicy. Dislikes sweets (any dessert).
Sam: Likes rice. Dislikes noodles, dislikes bitter, dislikes coffee.
Sonia: Dislikes rice, dislikes tea.
Tody: Likes fish and seafood. Dislikes spicy food.
BIRTHDAYS:
Many birthdays were changed in update 3.70. After checking other plays, it seems to be a consistent change, and not random. I am only including the ones that I have uncovered in v3.71.
All Birthday Gifts are 2x value for remembering their birthday (another good time to splurge).
Month One | Month Two | Month Three | Month Four |
1/10 Antoine | 2/8 Oaks | 3/1 Alice | 4/5 Nora |
1/17 Emily | 2/10 Albert | 3/5 Arlo | 4/8 Tody |
1/20 Gale | 2/15 Sonia | 3/7 Lucy | 4/11 Petra |
1/23 Martha | 2/18 Mars | 3/11 Mei | 4/16 Isaac |
| 2/20 Phyllis | 3/17 Qiwa | 4/21 Merlin |
| 2/23 Presley | 3/23 Sam | 4/26 Paulie |
| 2/26 Remington | | |