Memories of the 28th Century

I have been trying to turn my pieces of a novel into a complete novel, but rumbled to a stop after 15,000 or 20,000 words in the first two attempts. The novel is about the nature of space-time and consciousness, or how consciousness is created, in part, by our conceptions of space-time or of some other fundamental basis for reality. The world is what you conceive of it to be, because that’s the only space-time in which those ideas could make any sense. On the other hand, the characters may be somewhat mad, or that may be the common state of humanity.

As it happens I have several episodes in a time travel novel written. They are written in the first person as narrated by the main character, who may be from a different space-time. The other major character is his girlfriend, who is mostly a foil for him, but she is involved in most of his adventures, and he has told her of the other trips; although she may have trouble getting him to admit everything about his activities in the future.

That gives me two possibilities for POV, first and third limited. I could also rewrite everything as third person omniscient, but I want some of the material to be rather intimate, and that doesn’t come across well in third person omniscient. I also have the choice of whether the male lead or the female lead will narrate. The guy has told his woman friend everything that he is likely to tell anyone. He even admitted that he and her grandmother were lovers, but he didn’t get her pregnant.

A further question comes up as to how or to whom the point of view character is recounting the events. Sometimes narrators aren't recounting to anyone in particular, but other times there is an explicit frame around the story.

And I just thought of another alternative. I could split the task between the two of them. There are things the the guy knows that he still hasn't admitted, and her perceptions of him may be a useful plot device.

I have no fear of any of the points of view; although I am often more comfortable writing in the first person. My quandary is determining which one would allow me to tell the story the most efficiently; that is how I could tell the story most completely.

Does anyone have an opinion or preference? If so, then let me know.