I'm no fan of Berman either, but to be fair, he only said 'backbackbackbackback' maybe half a dozen times, and 'Junior Griffey' maybe 3 or 4 times. :p
The nickname thing is what I really don't like. He uses these nicknames and says them over and over and over again despite the fact that he's the only guy on the planet that uses them. It's not working, Berman!