Bazile, the "novelty" wore off within, say, a very few years as probably with most marriages. However, it was replaced by what I might call attachment which has, over the years, simply but steadily grown/matured (do I hear groans from the audience - it's true though).
Renewing the vows is something neither of us finds attractive or worth while - our mutual history has done/established something far more to the point. We are undecided how to mark the anniversary in the summer and so far have spent little effort on mulling it over.
One indication of how unconventional we have been on this front it may be of interest that we actually had our honeymoon before we got married - had to wait for the formality of allowing time from announcement to actual wedding so nipped away on an impromptu holiday. We don't adhere to the social formulae beyond absolute needs, and we agreed it was necessary to get married quickly although neither had intended to. Oh, the guesses are wrong - we had our first child almost nine years later.