What is the best dinosaur to have as a pet, if the goal is to have it do tricks?
It all started as a joke among us, the idle children of the technocratic class that effectively, in all but name, took over the United States in the mid-2030s. The lolcats of yore were replaced by dinosaurs, and a dino-craze took over us idle, over-educated children whose jobs had been AI'd out of existence. Even the brightest among us were too dumb compared to the AIs to be trusted with the Body Economic, and so we were left with our guaranteed minimum incomes and way, way too much time on our hands.
Then the idea came to us: with the super-Crispr (clustered regularly inter-spaced short palindromic repeats) gene editing technology, the artificial wombs/egglayers that replaced those inhumane poultry and meat factories, it would simply be a matter of gathering enough living bird DNA, doing some impressionistic splices based on cheap Amazon simulations, and voila, dinosaur. A bio-wikia was soon started, and within days the components all came together.
Now is the time for a decision. We want pet dinosaurs. I'm partial to a T-Rex myself, but vaguely concerned that with their walnut-brains, they might simply be too dumb to train, and the project might turn boring and bloody if the pets start chomping on their trainers or even worse on the human guests and other legal nightmares.
So, I want a dino pet. I want it to be as large and fierce looking as possible (roar). I also want it to rollover and play dead when I ask it to. What's the best species to choose for resurrection, if any?