By That Baldy Fella, Aged 6 And A Half (Mentally)
Number 1 - They are very big. This means that they can stomp on things which are small which, as we all know, is very cool.
Number 2 - They have sharp teeth for biting things. Except for the vegetarian ones who have have flattened teeth but are usually very big instead which makes them ideal for stomping things (see point number 1).
Number 3 - They make places like the Natural History Museum much more fun because they have bones of these big lizard which were either very bitey or very stompy or both.
Number 4 - Godzilla is a dinosaur and Godzilla is cool therefore dinosaurs are cool.
Number 5 - Jurassic Park, Jurassic Park: The Lost World and Jurassic Park III.
Number 6 - The Land That Time Forgot, One Of Our Dinosaurs Is Missing, The Valley Of Gwangi.
Number 7 - And, of course, Walking With Dinosaurs, people.
Number 8 - Basically, they're brills and all other extinct animals are bobbins.