There are so many different things that can be exciting to me, not just one aspect or another. I'm turned on by fabulous diction for example, simply because it makes the libretto feel more meaningful, and the drama more real. I love lots of aspects of Bergonzi's singing but his sense of rhythm seemed so perfect for Verdi, bringing out a prominent aspect of his music (as opposed to in Wagner), and makes certain especially elegant roles sound so much better (such as Ballo or Luisa).
Obviously legato makes the melody seem SO much more beautiful. Bergonzi's greatness lied in part that he could combine perfect diction, legato, AND rhythm, that was the thing that made Verdi come alive for me.
I get the ping, high notes, etc, but these are just small parts of the roles, I can't really enjoy them witthout all the other elements. And at the extremes of my enjoyment, I get "excited".
Corelli was awesome, but lets take a famous role supposedly his fach, Manrico. He supplies the high notes of course. But his diction, rhythm and legato are just not very elegant, even under a taskmaster like Karajan. That's why I actually never really enjoy Corelli in Verdi, instead in Puccini or Giordano (for example), where a rhythmic sense is so much less important.
I just realized I have to clarify, I think many of Bergonzi's greatest assumptions were NOT from Verdi, so obviously he had a wealth of qualities he could deploy.