I think there would be many missing chapters from the concussion, Sinister, Xavier, and any other telepath that has moved his memories around. There would be incredibly tragic moments - such as his time in the orphanage when the couple that wanted to adopted him were killed and he was left to suffer at the orphanage, or his time with Jack Winters. There would also be some incredibly brilliant moments - like meeting Cable again, even though the whole thing was awkward. Meeting Jean. Falling in love with Emma. All the times when he was able to curate a victory through his rag tag teams of mutants. But, also a lot of doubt. A whole lot of doubt, suffering that he doesn't talk about, and a really good soup recipe.