One more thing about Lanigan: When he left WMJI, where did he go? Was it to another music station? No. It was to a talk station, where he could do his thing without stopping to play music. If you're a big name personality, and you know people tune in specifically for your personality, why would you want to interrupt your show with music? Especially if we're talking about current music.
Consider WMMS. They have a legendary morning personality. Nobody's going to force him to play more music in his show. That's why I say more personality means less music. And in some formats, like rock, the personality is more of a draw than the music. If you really ARE a personality, that's what you want.