First, I think Kellum sucks as an announcer, but it has nothing to do with him being a homer. I love it when school radio guys are homers, and they should be. That's the best part of a big play happening. When you can watch the highlights from a big game and get the team radio broadcast alongside it with the announcer going nuts on the call, it's 10x better than watching a highlight with Musberger or someone else faking some emotion on the live call.
Kellum sucks because he's not good at describing live action, he uses cheesy phrasing, and he just comes across as a goober, not because he's a homer. Some of the best team radio announcers out there were huge homers. Larry Munson was and will always be the best in my eyes, and he was far from objective, ever. Another example of this is how when you had big plays in the 2007 football season, everyone wanted to hear Jack's call of the play. That's because you wanted to hear the real emotion of a Bulldog fan making the live call. Jack is a homer, but he does not suck.