OMG!
'In a distant and second-hand set of dimensions, in an astral plane that was never meant to fly, the curling star-mists waver and part...
See...
Great A'Tuin the turtle comes...'
Excitement level may just be peaking now! Arfie, stop arguing and go read, I've told you before!
Beginning to end:
The Colour of Magic
The Light Fantastic
Equal Rites
Mort
Sourcery
Wyrd Sisters
Pyramids
Guards! Guards!
Eric
Moving Pictures
Reaper Man
Witches Abroad
Small Gods
Lords and Ladies
Men at Arms
Soul Music
Interesting Times
Maskerade
Feet of Clay
Hogfather
Jingo
The Last Continent
Carpe Jugulum
The Fifth Elephant
The Truth
Thief of Time
Night Watch
Monstrous Regiment
Going Postal
Thud!
Others:
The Amazing Maurice and his Educated Rodents (Discworld) - talking cat
The Wee Free Men (Discworld) - witches and wee blue picts
A Hat Full of Sky (Discworld) - as above
Truckers
Diggers
Wings
The Carpet People
Only You Can Save Mankind - excellent kids tv
Johnny and the Dead - as above
Johnny and the Bomb - and again
Please do start at the beginning because there can be in jokes, altough it won't spoil anyones enjoyment if they go straight to the end. I've read everybook at least twice and think I may well have exceeded todays sadness quota.
Best Character: Rincwind - the funniest, saddest, most sarcastic wizard on this side of the hub. I would consider marriage if it wasn't for the luggage getting jealous and having to have the librarian as best man.
There are also cartoon versions, graphic novels and of course live action plays (Mort being the best I've seen), with which to while away your life.
TP can often be found at alt-pratchett on the NTL newsgroups if anyone is interested in saying hello.