Out of all of them, I enjoyed watching PHP the most.

Dinosaur Revolution is nostalgia

I've only seen PHP, and am just starting LOOP

Clash of the Dinosaurs

I will not elaborate

A tie between walking with dinosaurs and prehistoric planet

Planet Dinosaur is the best, I'm not giving a reason

Glad to know someone still thinks about planet dinosaur, that gives me the feeling of a 6 year old boy in his room watching it for the first time in 2011