Major pTerry fan here. My favourite sub-set is the Death books. I think the character of Death is brilliant. I was first introduced to them by reading The Colour of Magic and The Light Fantastic which as any fan knows are actually quite different from most of the series.
Still waiting on enough money to refill my collection (so far I have bought about 4 copies of The Colour of Magic and still don't possess one in the library! Too many people like it after borrowing it I guess. *shrug* At least it keeps Terry in shoes I guess *grin*)
To read: Monstrous Regiment
Currently working my way through the Wizard books... ie Wizards Bane, Wizardry Compiled, Wizadry Consulted, etc
PapaBear (Fantasy Afficianado)