Altaïr: How you two wanted to live on the beach, coming home to go running in the shallow waters.
Ezio: Owning a boutique together - bigger than Hollister or H&M. You'd both sketch and model clothing while earning high pay.
Connor: Camping - but roughing it. You'd both find a secluded area in the woods, hunt and fish, sleep under the stars, and swim in a calm river.
Edward: Buying a yacht together, naming it after you. You'd both take it out and sail down the coast, stoping in some exotic ocassion along the way.
Haytham: Writing a book together. It'd be either about his poems, or your made up-fantasy world about the supernatural and the war between good and evil.
Desmond: Owning a cute little bar in a busy place in the city. It'd be in the corner of a busy intersection, crowded every Friday night.