They also showed Utahraptor on the wrong continent, if I remember rightly. Not a big fan of that series.
On topic, it's hard not to be fascinated by Tyrannosaurus as there are so many curious factoids associated with it. We think of it as the archetypal large theropod, yet it's actually a very unusual creature, even compared with its relatives. Stocky and steroidally muscular, battery of senses that's rarely (if ever) been bettered in a terrestrial animal, bite powerful enough to crush bone like mild cheddar, may have been highly social, comparatively large brain, underwent vast physiological changes over the course of its adolescence, and monopolised predatory niches across its ecosystem right from childhood. Represents the apex of an evolutionary arms race of heavily armed leviathans that occurred in North America at the end of the Cretaceous.
It's a dinosaur known from a good catalogue of evidence, we even have skin impressions and
biological material. And then you have the various controversies that've sprung up over the years, such as the scavenging bullshit. And of course the memorable representations in popular culture, which makes you (or me, at least) wonder what they'd be like in the modern world. If anything, Tyrannosaurus was more deadly than portrayed in Jurassic Park. Imagine five great white sharks rolled into one, on dry land...
Also very interested in early theropods, from the earliest known example of decent size, Herrerasaurus, through to Coelophysis which formed archetypal shape for the late Triassic, and to Dilophosaurus, which I believe is still the largest known predatory dinosaur up to that point (and whose taxonomy is widely debated - I like to think of it as one of the last coelophysoids, but it may be closer related to Ceratosaurus).
Aesthetically though, I love diplodocids. Very evocative.
...Though any kind of sauropod will do.