at least three of the albums listed here http://board.okayplayer.com/okp.php?az=show_topic&forum=5&topic_id=2533825&mesg_id=2533825&page= aren't in your top 20, and at were time were in heavy rotation, meaning there are a couple of songs you can spit line for line.

It gets questionable if you place all of those three in the bottom tier of your 20.

Now this doesn't mean you don't like rap music or aren't a hip-hop head, but you're likely more attracted to the other elements than to rapping itself. You like rapping which accessorizes hot beats, or your perception of 'street culture', or even da bitches that get down to it. But rapping itself, you could probably take or leave.
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Big PEMFin H & z's
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"I ain't no entertainer, and ain't trying to be one. I am 1 thing, a musician." © Miles

"When the music stops he falls back in the abyss."