I love the spice mezcal brings to a Negroni that is going beyond the mellowness of a regular Negroni and much rougher than a boulevardier. I still wouldn't choose a very smokey mezcal, as the flavor will stand out a lot. I use a tamer mezcal with fruitier notes than for example Del Maguey Vida.
The quest for the perfect Megroni is on!