I love a good "go back and live your life again" story. For published examples, I highly recommend Replay by Ken Grimwood and The First Fifteen Lives Of Harry August, by Claire North. Fantastic, the both of 'em.
I like some of the amateur stories here with the same theme, too, but too many of them (strictly in my opinion) seem to follow a distinct pattern:
1) Protagonist is shown in his older life, generally at least middle aged.
2) Holy crap, I'm back in my younger self! This is freaking me out!
3) Man, the girls sure are purty. But no matter what I look like, I'm way too old! It would be wrong!
3a) Never mind, I'm gonna have all the sex! Yeehaw!!
I labeled that last one as 3a instead of 4 because it generally seems to take Our Hero about 3.7 seconds to get over his moral qualms and start bedding everything in sight.
Please note, I'm not saying there's anything wrong with these stories. I don't mean any offense with my admittedly ridiculous summation of them. They're just not my cup of tea, is all, which is frustrating because they seem to be the most prevalent type of these stories on this site.
So does anyone have any recs for good do-over stories (or hell, one way time travel of any sort) that don't turn into sex-fests? Or that take their time to get there, at least, and preferably show a real relationship developing before anything physical starts?