My friends and I loved this cake so much that it became our default celebration cake for several years in school (and even after) and we took a really long time to get sick of it.
What made this stand out from the other crowd-pleasers then was the crisp sheet of feuilletine-like hazelnut flakes, right smack in the middle of alternating light chocolate and hazelnut mousse layers and fluffy chocolate sponge with a dark chocolate ganache lacquer finish. It was impossible to go wrong with this number.