Ah, I've answered these questions so many times before but I still love these kind of threads for some reason!
Most?! underrated. Hmm. A toss up between Davidoff Adventure and H&G Skarb. H&G as a house is really underrated and I'm not sure why.. I would think that a new niche house that really does push the boundaries with some odd/crazy scents would be just the kind of thing that would whet the appetite of the BN veterans. An enigma!
Closest thing to a signature scent for me: Amouage Reflection Man. Other scents that people may recognize me by: Lyric Man and Bois de Turquie.
Guilty pleasure scent: Givenchy Play. I think this one is underrated, too. I'd think a lot of people here would like it if they could look at it without prejudice, especially as it has a really nice and fairly prominent golden vetiver note in the base.