I think that accuracy, instead of succinctness or liveliness, is the most important thing in writing dialogue from memory. However, as there are many different types of stories that would be written from memory, it differs.
If you write a true story from memory, you want it to be accurate. If it’s not accurate, then it’s not true. However, unless the person who is reading it was there, they wouldn’t know for sure what happened.
If you write a true story from memory, but it’s a very boring or tedious story, maybe having succinctness or liveliness is a better bet. However, I still think accuracy is the most important thing in writing dialogue from memory.
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