[wicker]

Moshe makes a good suggestion. Small Gods is a favorite of mine and it stands alone well enough.

I looked and generally agree with that suggested reading order and I started with the Watch series. I'd pick one of those series, give the first book a shot, but if you hate it maybe give one of the other continuities a shot before you throw in the towel. I hated the Rincewind novels and it took me a while to come around to the Witches (now I love them) but I thought the Watch books (starting with Guards! Guards!) to be absolutely fantastic.

He's written a lot of books of varying quality over a lot of time so I always warn people to be prepared to give him a second chance.

I met him once when I was a teenager. He was really kind as well as insightful and funny.