The little planet we occupy has orbited a minor star on the fringes of a rather average galaxy in a universe of unimaginable vastness for over 4.5 billion years, yet our particular species of primate arrived on the scene very recently indeed.  It is humbling to realize that, when we liken the age of the earth to the life-span of an average person, mankind has existed for less than the time it takes to say 'Homo sapiens'.

'It's happened at last,' he moaned.  'I'm going out of my mind.'
Good idea said the voice.  It's getting crowded in here

Rincewind shivered.  He was not, of course, an atheist; on the Disc the gods dealt severely with atheists.  On the few occasions when he had some spare change he had always made a point of dropping a few coppers into a temple coffer, somewhere, on the principle that a man needed all the friends he could get.  But usually he didn't bother the Gods, and he hoped the Gods wouldn't bother him.  Life was quite complicated enough.

Picturesque meant - he decided after careful observation of the scenerey that inspired Twoflower to use the word - that the landscape was horribly precipitous.  Quaint, when used to describe the occasional village through which they passed, meant fever-ridden and tumbledown.
Twoflower was a tourist, the first ever seen on the discworld.  Tourist, Rincewind had decided, mean 'idiot'.