In particular, I'm really feeling a couple of things:
A couple who lives in neighboring buildings fall in love from across the way, all without speaking a word to each other. OR first loves who meet again after years apart, one or both are single parents. OR a long distance romance. OR what is supposed to be a short term vacation romance turns into more. OR a widow / divorcee finds love again in her new small hometown. OR the ghost and the human.
If you like these ideas, or any of the others linked above, or even want to bring me yours, please comment HERE.