I'm normally a fan of bitter and other really strong flavors, but personally most negronis are just too much for me, lengthen it out with some prosecco to make it sbagliato though and it's a damn tasty drink.
I love Negroni. It needs to be on the rocks tho. If you do it properly, it needs to be cold. Also in terms of quantity, no ice means a ton more alcohol, I prefer to drink 3 properly made if the goal is to get drunk.