What I hate is how uninteresting the enemy is in most games - probably partly due to people increasingly gaming on controllers. So many games combat is just about health pool and damage output with the enemy not even doing anything interesting movement wise let alone any actual AI component.
Also I don't think AI developers even exist in the games industry anymore. It's just bundled in with the engine, or has the bare minimum to function.
Half Life 1 had enemies which took cover, tried to flush you out and flank you, avoided your aim etc. They took effort to beat. Same with Fear 1. They also designed the maps to make use of it (great map design being another art which has been lost).
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