As a radio host you need to have personality, no matter what anyone says about the style of hosting you should have on-air you should have a brand. I'm not talking about selling-out or typecasting yourself into becoming someone you are not when you are not behind the mic, I am talking about developing a brand for yourself that will lead to consistency for your listeners, something they will thank you for.
I just read a great article on the development of Hillary Clinton's branding for the upcoming American Presidential Election. A lot of the same considerations that are given to personal branding in politicians should be considered for on-air hosts and other public personalities. For more on how you can build your brand in 5 days (in pretty simple ways) click here.