I have just enjoyed my very first Terry Pratchett book, The Colour of Magic. What fun! I love the Luggage and Hrun the Barbarian. "Like finding apples under an apple tree, you find treasure under altars." Priceless!
Only mild spoilers here, and since I'm the last person in the civilized world to read this book, it probably doesn't matter.
One of the most interesting things about it was how it was riddled with "mistakes." For example, at first Twoflower cannot speak the language, and Rincewind communicates for him. Then, somehow he sells an insurance policy to the innkeeper without any translator. Henceforth, he speaks with no translation.
But somehow it doesn't matter. I also love Death. And I particularly love the encounter with Scrofula. "No one dies of Scrofula!"
I'm looking forward to the rest of the series.