It was especially interesting because in order to train the creature what behavior was or wasn't desired you had to catch them in the act doing that thing. Since the creature was an independent actor who you could only influence, you had to rely on the randomness of the AI to do certain things so you could teach them what was good and what was bad. E.g. you can't teach it eating villagers is bad unless you catch them in the act and smack them around. Such a shame they almost completely did away with that teaching-through-doing part of creature-training in favor of simplifying down the creatures behaviors to basically sliders like "good vs bad" and "friendly vs aggressive" in BW2. Still waiting on a proper spiritual successor to BW1... what a brilliant game.