I was just looking at a random sampling of some of your 0 score questions and, honestly, I'd be tempted to downvote a few of them, or even cast close votes.
The hover-text for the upvote arrow says "This question shows research effort; it is useful and clear."
We tend to upvote well thought-out and thoroughly detailed questions. It seems that some of your zero score questions are more like one or two liners without a lot of detail. Sure, they can probably be answered, but they're generally not great quality. the definition of "useful and clear" varies from site to site, especially clear. We expect a high level of detail, since our jobs require it.
Also, we have many specializations in our field. A storage specialist that stumbles on an AD question that he thinks he might be able to help with may leave a comment for clarification, but may not feel qualified to judge whether or not it's worthy of an upvote.
That said, we probably could vote a little more overall. The problem is that most of the regulars on meta do already vote quite a bit, so this might be falling on deaf ears.