I searched and was surprised not to find a thread about this already (if there is one, my apologies - someone give me a link and I'll head in that direction).
What are your favorites for keeping in your home bar, and why? Doesn't have to be strictly sweet vermouths, but bottles that approximate that role in cocktails (i.e. Punt e Mes qualifies, and there are probably some amaros that fit the bill).
I had my eyes opened (wide!) by a bottle of Carpano Antica Formula that was gifted to me, but now that it's gone I don't want to just keep buying the same and am curious as to what others feel complements their manhattans, negronis, vieux carres, etc.