Ads with audio (video without audio doesn't bother me that much unless I'm on mobile, in which case it's eating up my mobile data), ads that pop into the middle of the screen, ads that run any JavaScript, etc., are unacceptable. But a simple banner on the side, even if it's an animated GIF? I'm alright with.
Unfortunately, ad networks decided that their ads are more important than the content I'm trying to view and have brought ad blockers upon themselves. And don't get me started on malvertising...
* ADs are acceptable to me. I just don't want creepy ads that follow me around. And data about my browsing behavior being traded in Ad networks.
* Personalize Search Results drive society appart, and lead to radicalization. Not a fan.