There's a great quote from an AI programming book I feel like is worth copy/pasting here:
"The designers of the AI for Halo, for instance, discovered their playtesters could be fooled into thinking the AI were more intelligent simply by increasing the number of hit points required to kill them.
For one test session they allowed the agents to die really easily (low hit points); the result was that 36 percent of the testers thought the AI was too easy and 8 percent thought the AI were very intelligent.
For the next test the agents were made harder to kill (higher hit points). After just this small change 0 percent of the testers thought the AI was too easy and 43 percent thought the AI was very intelligent!"
Can't say I've ever though that the AI was "more intelligent" just because it took longer to kill them?! what kind of retards play tested this game?