Today he came out with "The Letter" announcing his return to Cleveland (http://www.si.com/nba/2014/07/11/lebron-james-cleveland-cavaliers)
I don't root for LeBron. I saw him play once at the MCI center in DC. He was powerful and fluid and at times it looked like he was playing a level above the Wizards. Yet, I prefer the underdog and I don't really like to root for "the best player." It took me a long time to appreciate Michael Jordan. I had Magic Johnson posters in my bedroom and it took a long time to let that go.
"The Decision" in 2010 made it easier to dislike LeBron. His televised hubris was more than I could stomach, but I'm not a Cleveland fan and so my wound wasn't particularly deep. I rooted hard against LeBron last year and this year, but my interest didn't come from a place of anger.
I'm impressed by "The Letter". LeBron seems to want to do more than win. He wants to pick up a region in the process. He knows this time that it won't be easy. He lays that all out eloquently. I can't help but cheer a little bit for a hometown hero returning home and trying to lift Ohio up. It sounds like a movie. The only mis-step I see is that hubris once again. He told Cleveland and Miami at the same time that he told the general public (EDIT: Apparently that's not true. Guess he learned several things.). Perhaps I don't understand free agency and I don't understand what it's like to be considered "the best", but it strikes me again that he is putting himself ahead of the organization that gave him his "college education" and the organization that he's returning to.
I can root for Cleveland and Ohio as places, but I'm not going to root for LeBron or the Cavs for long. By the time LeBron takes home his first million, I'll be rooting for the Wizards, the Spurs, and most of the rest of the NBA to take him down.
I can root against him and admire what he's trying to do.