"I disagree," returns Cambridge. "In fact, I think my personal preference, and my personal memories, are negligible."

If he could create a timeline where billions weren't lost to the Borg, and where the multiverse did not end, then he would choose it, even if that meant that he would never serve on Voyager. Or meet Seven of Nine. His personal happiness, weighed against the numerous razed colonies, slaughtered civilians, destroyed ships... There is no comparison at all.