'Hero of Leaf Village' follows basic Harvest Moon rules where Friendship is concerned. Your Friendship Levels with specific Characters will determine your success or failure in any specific quest to save the Land. Beyond that, marriage is a possibility once you have saved the Land from destruction and therefore, your Friendship Levels with the Eligible Girl of your choice will determine your prospects for marriage.
In 'Hero of Leaf Valley', 'meeting and greeting' any Character on a given day will raise Friendship by +1 FP. A gift of a 'Most Favourite Item' is worth +3 FP. A simple Favourite is worth +2 FP and an acceptable Gift is worth +1 FP. Unlike many other Harvest Moon games, unacceptable or disliked items simply will be refused. You therefore cannot 'waste' an item by giving it to some one who will not appreciate it.
You are allowed to give one Gift per day to any Character. There is one added twist to this in that an item that has been refused counts as the gift for the day even though it was not accepted. You therefore can waste your opportunity to give a desired Gift, although you cannot waste an actual item.
Gift-giving is fairly easy in Hero. There are a number of inexpensive items that can be found in the Wilds that are acceptable to almost every Character in the game. These include Fruits and Berries, Red Herb, Flowers and any size of Fish. Crops and Eggs are acceptable as well to most Characters. There are only a few exceptions. Chester does not care for Crops, while Joe does not like Red Herb. Ponta likes ONLY Fish.
Although most Characters will not appreciate the Gift of Fodder, there are a number who do. Bob, Chester, Joe, Parsley, Ronald and Rudolph all will accept Fodder happily. As the Meadow on your Homestead is filled with fully ripened Grass that needs only the use of a Sickle to be transformed into Fodder, this item makes a perfect gift for the individuals who appreciate it.
Another item of little general value but which is appreciated by a few is a Failed Dish. Aurelia, Chester, Rudolph and Zann all will accept Failed Dishes with pleasure.
Insects, on the other hand, will be acceptable solely to Tim, who collects them and actually will pay for them. Scrap Metal can be given to Zann in a sequence of transactions that ultimately can allow you to obtain Accessories.