Borderlands 2 Video Interviews

Both G4 and BuzzFocus turned their attention to Borderlands 2's lead AI programm Jasper Foreman to hear about the loot-driven FPS/RPG sequel's improved AI and enemy behaviors. Luckily for us the first also has a short write-up on some of the new enemies, so I'm going to quote from that:
Goliath

Going online. The goliath is a tin man with a heart of gold. Wait, a minute. I take that completely back. Goliath is a raging beast that kills anything and everything in his way. And here's the trick: with every mob kill, this beast grows more ferocious and that much harder to kill. Left uncheck, this monster could quickly tower above you and the rest of your companions without breaking a sweat.

Do you go for the brute or the mobs swarming around him? Decisions, decisions.