I don't know about others, but to me part of what makes a great announcer is knowledge of the cars, classes, and the nuances of racing. Just a few examples on the Big Show side are guys like Alan Reinhardt, Brian Lohnes, and Jason Galvin (nhra.tv) who are well versed in all those areas. They are good at turning the class idiosyncrasies into points of interest that expand viewers' or attendees' understanding of what's going on both on track and behind the scenes. The better announcers have patterned their style (in part) after legends like Steve Evans and Bob Frey, whose depth of knowledge was outstanding. Not saying there are no ladies that can do this, but they appear to be few and far between. Interviewers like Amanda or Jamie serve a different purpose in racing media and are good at what they do, but that doesn't necessarily make them good announcers.