Humans are mammals and they can be considered big so does that mean you like humans?
Some female ones yeah :)
Spinosaurus is my obvious pick. It's my favorite dinosaur and my favorite thing in general, though it has recently been downgraded to be some sort of giant duck-alligator
Sucks that it doesn't appear in Jurassic World. In fact, they made fun of it, lol, in one scene you can see that another dino thingy topples a spinosaur skeleton. Still, Spino is better than T-Rex :(