We generally consider the classical HIPS as a 1st generation solution that gradually evolved in the 2nd generation behavioral solutions more intelligent to not ask many (if any) question... You know, for the most part, the user has always been the weakest link in the chain - and this applied not only to the average Joe but also to the geeks. And the reason for this is that the more questions you're getting, the more annoyed you are and the the less attention you give to them... so that the one REALLY important questions that you eventually get when the latest and greatest piece of malware hits your rig will simply be overlooked and answered incorrectly.
HTH,
Vlk