here's a part of an interview I read a few days ago and it *partially* explains why Encore wasn't as good. Well not really, but here it is:
Loder: Does your daughter Hailie know who you are, in the full sense of it?
Eminem: Oh, yeah. She does now, she definitely does. She's five years old now, and she's really smart for her age. And my niece lives with us too, and she's eight, and Hailie learns a lot from my niece ... they just feed off each other. It's kind of scary, how smart a little girl can get so quick. She has sleepovers and their friends run around the house, like, "Is that your uncle?" They say, "Hailie, is that your dad? You're so lucky." [They're] getting autographs before I leave, and asking me to come upstairs and rap for them. People used to ask me, "Do you let your daughter listen to your music?" And it used to be � when she couldn't pick up on it � "Yeah, I do." When she didn't understand all the words. But now she's starting to understand all the words, and � especially [with] my new stuff � I can't really play it around her. She picks up on it, and I don't want her to get the wrong idea, because she's not going to know how to take it.
Loder: What words do you not want her to hear?
Eminem: Not just the words: the anger in my voice. I don't bring that around her. That's one thing I don't want her to see or to have to experience. Being this little, the only thing I want her to worry about is playing � What's she going to play with today? Is she going to play with dolls, is she going to color today?
Loder: Are there words or concepts you don't want her to hear either? Or just are there songs you prefer to keep away from her, not just because the anger in them, but because of the things that you are saying?
Eminem: Yeah, it's a combination of things, but I think � mostly with my new material � I think it's the anger in my voice even more so than the words.
Loder: The stuff you're writing now?
Eminem: I used to play my music when � If I was working on something and checking out a mix, I used to play it around her. But now, it's like, I don't even want to do that anymore. The more adult I'm becoming, the more I'm realizing that this might have an affect on her, or it might scare her, or she might hear a word or a sentence that she doesn't know how to take. I'd just rather not even play it around her.
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The part about the anger in his voice. I thought that was an interesting part cause if you listen to the tracks that people don't like on Encore (and ever since) most of the times, he sounds bored, like he's just talking. Even in his good emotional songs on Encore, he sounds bored. One of the reasons is that he mostly talked about pointless stuff and he probably lost that anger/fire in him when he made all those songs. But I guess it was also a conscious decision, to try to make songs with a "lighter" voice. Anyways, like I said, it's not really an explanation, but I thought it was interesting, especially since that interview is from around 2002.