Texas rap has played no small part in hip-hop's history. More specifically, Houston (and of course P.A.) rap has played no small part in hip-hop's history. (There are other cities in Texas, I hear, though with the exception of Dallas's brief swag-based blip, they've, to this point, remained largely invisible on a national scale.)
There's been The Geto Boys, Rap-a-Lot, UGK, the 2005 boom, the titans that preceded the 2005 boom, etc. Finding albums to rate the best has never been a problem. Actually rating them though, that's something completely separate.
However, after about 1 million hours of arguing and about 2 million emails, this is it: These are the ten greatest Texas rap albums that ever existed.