That's the thing for me. I watched him in the Boston and Chicago series, and in both he was a clutch killer. That's one of the big reasons I was excited about the Dallas-Miami final. Dirk and Lebron were both playing at their peak, and I figured you'd see an epic battle.
In the 4th quarter, in a tight game, or when closing out the series, Lebron was the one to drive home the dagger. He had Wade by his side, but he put the dagger in both Boston and Chicago, and he was doing it on both ends of the floor, whether it was shutting down Rose, getting the big block, the big steal, the big 3, big dunk, whatever. He was closing them out the way you would expect a great player to do.
For whatever reason, whether it was something Dallas did or some personal issues as was rumored or just choking on the big stage, he disappeared late in the finals. I didn't really follow the Heat all that much this year and really only picked up on them after the Grizz went out mainly because I wanted to see the team everyone hated most win it all, but what I did watch of them, Lebron was showing flashes of greatness. That disappeared a couple weeks ago when they started this series.
I've always thought Lebron had everything but that killer instinct. He really showed the killer instince finally in the previous two series but then lost it on the biggest stage of them all.