We often find that non-vintage Champagne can have flavor profiles all over the place. Some are high acid with simple citrus fruit flavors. Others have strong lees components. Others still may have some indication of age because, well, we simply have no way of knowing how old that bottle was to begin with.
Champagne Taittinger's Brut NV definitely fell towards the end of being one of the more complex non-vintage Champagnes we've had to date, and now we simply want more!