My pick would have to be the A Whole Nother Story trilogy, in which (spoiler warning) you can only travel back in time. But because time is in a loop of sorts, if you go before the beginning of time, you will be at the end of time. From there you can go back to any time you want to. And time paradoxes cannot be produced. Plus, your memories from the previous timeline exist as well as the memories from the new one.
This was my answer as well. How out of place the MC feels each time he returns ‘home’ (and how his views no longer fit with societal norms), how he gets jerked around by the military he’s fighting for, how he just never can fit in and returns to service…
I’ve seen that happen to a lot of people. I think the story does an excellent job of conveying those emotions to someone who would otherwise be unfamiliar with them.
This sounds rad!
How the entire human race clones itself into one homogenous being called “man”