There are some great traditions in New Zealand.
One is we don't - as a rule - tip.
It's not part of Kiwi culture and I've always liked that.
Around the world, tipping is usually not about thanking someone for great service - it's about increasing the wages of the lowly paid.
In the United States, tipping is the rule rather than the exception and you get both good and bad service - the addition of a tip doesn't seem to make much of a difference.