Immortality was a ping for her, a throwback to her Borg roots that was as important as perfection to their collective desires. Had she remained a drone, she would have thrived for centuries without aging, sustained by the cybernetic systems and constantly regenerating nanoprobes in her blood stream. And while it's certain she'd live far longer than any human being was ever meant to, she won't live forever like a drone would have — could have.
She didn't know how she felt about that.
"I can agree with you on that." Regret? Guilt? No, thanks.