1: Doing it all Over by Al Steiner One of the seminal "Do-Over" stories, and excellently written. If I was to assemble a list of "25 stories anybody on SOL should read", this would be one of them.
2: First Camping by just-this-guy This is the first in a series of "First" stories written by just-this-guy. All are rather enjoyable, and many of the reasons for the encounters are funny and enjoyable to read.
3: Lucky Tickets by JiMC Another very good series. A kind of mind control story, the main character finds a spool of "Lucky Tickets", and by handing one to somebody he gets a limited form of mind control over them. A very good series, but sadly incomplete. But what is there is well worth reading.
5: Once More With Feelings by The Night Hawk Yet another "Do-Over" story, but this time with a difference. In addition to returning to a younger age, the main character and another also exchange bodies and genders. Very well written, the only sad part is that the story never continued.
6: Overcome by Lust by Al Steiner An interesting work of Al Steiner, and part of a series he wrote about a fictional California town. Has a great story, and opens with some great interactions between a young couple.