Here is how I see it:
Zoo Tycoon 2
Pros;
Breeding I think this is one of the best parts of the game as everyone sees it in a different way. Some people use it as a method of getting more exhibits cheaply. Others just want cute little baby animals. and some people, like myself, just want a bit of cash so we sell all the babies

Terrain tools The sculpting tools allow you to really put your imagination in the game. One of my favourite things was creating enviroments that looked like something from the wild rather than what the animal wants. Such as useing a mountain for my snow loving animals rather than just a pen. Swamp enviroments also hold a place in my heart.
*please feel free to add your own ideas. These are just examples
Cons;
Visators The geusts in Zoo tycoon are quite possibly the most annoying things EVER and woefully un-human. I mean, I'm sure all of you have had a bunch of angry geusts complaining about the lack of a donation box. I mean seriously... They walk around with big cheery smiles but clicking on them reveals that they are infact secretly hungry, thirsty, tired, unhappy and need to go to the toilet. To rub the effect in, the camera that is tracking them passes a bathroom, some food and drink vendors and a line of benches. Why aren't they useing these cleverly placed amnitties? Because they are too busy trying to find a fuggin donation box!

Another notable time was when I released my lions on them. The lions ran around the place and the screams that issued forth made my ears bleed temporairly. I quickly shut off the sound and listened to some calming music to spare myself.
Model/Animation quaility *pukes*.....*pukes repeatedly* Even if a game is made for young kids.... Nothing, just nothing redeems the crappy modeling. The unrealistic cartoony animals ice skate (bad animations) around the enclosures. Have you ever seen a lion chaseing a Zebra? At first you are on the edge of your seat expecting the lion to leap onto the fleeing Zebra when it suddenly crashes into the Zebras fat behind. The Zebra runs off while the lion claws feebly at mid air like a 90 yr old fat cat with arthiritus (The Fleeing Zebra often implodes at this stage leaving a rib cage behind, some times ya gotta admire these guy's logic) The geusts look like evil robots that with painted on happy faces and clothes (that would explain why they make me so angry...)
Again, these were just examples, please put foreward your own points
Jurassic park: Operation Genesis
Pros
Behaviour Clearly alot of work was put into making realistic behaviour in JPOG. And it shows. A lazy hour or so can be spent just watching the life of a single raptor in its pack or a T-rex on site B. Instead of having food just plopped onto the ground infront of them the Carnivors actually hunt for their food. Even if you dont have a food despeniser set up they will hunt other dinosaurs for food, and people if it comes to it. Sadly this is offset by the lack of breeding, meaning your herds of hearbavours slowly dissappear and then the carnivours follow as they die of hunger....
Model/animation/sound Quaility The models look superb. In one sentence that pretty much sums them up. They are made of seperate parts so you can see the animations being blened together. Such as a Spinosaurus randomly scrathing the side of its head as it walks around looking for food. Its these little things that I like about it. The sounds sound realistic aswell and very life like. That siad, I dont exactly know what T-rex sounds like but I can imagine it would be pretty similar

Cons
(where to start...)
Visators

They generally suck! It would take me hours to document just how annoying they are.
lack of features One thing that annoyed me was the limitations of the game. It got boring quickly, Safari rides could only drive through one exhibit. the Absense of a vital hotel building. The terrain editing system is horrible and allows for almost no creative design. The large carnivours rarely attempted to escape and just wandered around happy and content no matter what. I dumped a T-rex into the smallest size of encolousre with just one food despenser and low security walls. It lived a long happy life -_-
OK everyone. My hands are tired and I need to get back to the rest of the site. So please disscuss!