The problem I'm encountering is that the "Camera Following Style" seems to be set to "Never" for all 3 Settings, but actually i want it to be "Smart". Changing between settings in the interface menu doesnt help. I had a glimpse ad this list here : Console variables - WoWWiki - Your guide to the World of Warcraft but couldnt find anything helpful.

I also rebooted my computer and restarted WoW etc, had this a few days now.
Any advice ?

What does End do? nvm, when I saw this post I thought of a scenario that has been buggering me:

You're running away from an enemy. For some reason he's not your target and you can't click him unless you turn the camera around (w/ left click+drag). But since you have a "Smart" camera it'll turn around leaving you without your pursuing enemy as target 9/10 times.

Usually I just jump > turn 180 > TAB > turn back, but I'd rather have some modifier lock the smart camera or something similar.

I believe the solution is quite simple (if I understand you correct); add ctrl to your sequence => ctrl + left-click & drag. This results in your camera not going back to it's original state even though you have the smart camera option enabled.

Thanks, it's exactly what I was looking for