If Winston Peters was hoping the final count of votes would make his decision easier it has not.
With an unusually large number of special votes cast this year he had reason to hope they might go heavily to the left, giving Labour and the Greens a margin over National. But the left has picked up little more than it usually does on specials, gaining two more seats at National's expense. It means that a centre-left government could have a majority of three seats which is more comfortable than the single seat margin it had on election night.
In one sense that makes Peters' decision harder. Both sides would now have a comfortable majority with NZ First's support. He now has to decide what most of the voters want.
Labour is arguing the results speak for themselves, there is "a majority for change". But that assumes all those who voted for NZ First wanted a Labour or Labour-Green government. That is a big assumption, nobody knows what they wanted because Peters gave no indication before the election what he would do.
NZ First is a repository for votes of people who do not much like either National or Labour. There has always been a proportion of the New Zealand electorate who declare a plague on both their houses and either do not vote or look for an acceptable third party. Peters has appealed to those people because he not only keeps his distance from both sides but presents himself as a check on both. His supporters think he "keeps them honest".