Creative Mode is awesome in Pre5. All enemies are neutral to the player unless attacked, so I run over to Creepers and hug them. :D
Too bad it's buggy or incomplete right now. I think the way Spiders become aggro'd only in dark places overrules the neutral setting and makes them go after you without directly being provoked. Also, Cave Spiders that spawn are instantly aggro'd against you. And most obviously, looking at an Enderman aggros them no matter what.