Maps based on nothing but your own mind

Its actually more of a question, but here goes:
What is the general consensus about maps which are nothing more than the imagination of the maker? Let me elaborate. When bored in class i draw random landscapes from time to time, to form some kind of world map (not like we know, with different continents, forms, etc).
Its not really based on something, but we can achieve maps like classic this way. Same type of gameplay, but a different map with other routes. How interesting is this, and who would be able to make such a map?
If you want an example i'll try to scan one of my images.
Im no artist by any means, but if anyone wants some ideas or a draft to start with, i can show you some exaples to work with.
What is the general consensus about maps which are nothing more than the imagination of the maker? Let me elaborate. When bored in class i draw random landscapes from time to time, to form some kind of world map (not like we know, with different continents, forms, etc).
Its not really based on something, but we can achieve maps like classic this way. Same type of gameplay, but a different map with other routes. How interesting is this, and who would be able to make such a map?
If you want an example i'll try to scan one of my images.
Im no artist by any means, but if anyone wants some ideas or a draft to start with, i can show you some exaples to work with.