I've never loved Scarface,
I love the Slim Shady LP, don't get me wrong, but it's definitely got a more lower-budget, unrefined edge to it that makes it stand out from the rest of his work. Some would argue, and I'd agree to an extent, that that is where Eminem thrives, but I think that approach culminated in the MMLP and I really don't think he'll ever top that album.
The way I characterize that is that when I'm listening to the MMLP, I can listen to it all the way through without skipping any songs. I can't do the same for SSLP, as I've never really loved "my fault" and "if I had", and a few others that I can't remember off the top of my head. There are some in Eminem show that also not crazy about, but only like one or two.