Bruce Willis had not hosted "SNL" since September 30, 1989. On that evening there was a "Thirtysomething" sketch and the fourth ever appearance of "Wayne's World." It's nice that Bruce Willis was promoting absolutely nothing, so in my own little fantasy world, I picture him waking up one morning and thinking "You know, I haven't hosted "SNL" in 24 years, I better get on that."
The most successful hosts of late -- Justin Timberlake, Emma Stone, Christoph Waltz -- never try to make the show about them. They try to integrate themselves into the cast, basically becoming a cast member. The Miley Cyrus installment was mostly about Miley Cyrus. And, it's funny, in the few sketches that she wasn't playing herself or an exaggerated version of herself, she was good. Unfortunately, there just wasn't a lot of that.