morrigan loves gifts such as jewelery "golden necklace" and the "tribal necklace" (which you get from a barrel in the room you set the signal fire in ostagar) also morrigan is only a romance option for the male PC (i managed to bed morrigan right after lothering with no cheats too i might add)

Leliana likes pretty much any gift that is "holy" or has something to do with "Andestre"