Heh, all you gaming youngsters.
Either companion in Daikatana was easily the worst AI you could get. The AI programming for your companions was typically "Run towards enemy". Let's totally disregard the fact that you haven't given them a weapon yet. Let's forget that this enemy is in the middle of a BUNCH of other enemies. Let's just run towards them.
Completely ruins the chance of you bypassing a room of baddies with stealth or taking out a swarm of frogs (yes, frogs) with your grenade launcher. As soon as you get near the room, Superfly (yes, Superfly) runs in and gets it between the eyes. As soon as you launch the grenade into the swarm of frogs, Superfly runs into the midst of them to help catch it!
And let's not forget the fact that you fail the mission/chapter/era if either of your companions goes down and you've just turned the entire game into an escort mission!