Seasons and Divine Intervention will always be my favorite Slayer albums. Bostaph kills it on DI, and there are so many great riffs! Not a bad track on this album, but I especially love Fictional Reality, Dittohead, Killing Fields, the title track, and 213. Just an awesome album from start to finish.
I am one that really enjoys Diabolus as well. I loved it when it first came out and I still do. There are a couple of clunkers on it, but for the most part it is solid. In the Name of God is one of my favorite Slayer songs.
I like GHUA a little less than Diabolus, but it still has quite a few good tracks. I agree though, this is where the lyrics started to get spotty (Payback). Kerry King especially wrote some stupid stuff.
The next 3 albums don't do much for me. There are a few things here and there, but I don't revisit these often. I know a lot of people saw Christ Illusion as a return to form, but I could never really get into that one.
"It's all about the motherf***in' oil!" -Kerry King