Surely we can do better (and I will surely try to do so!).
But so can almost all members here (including you it seems, giving your own voting statistics ;) ).
Given the time and effort we as community moderators are giving this community it seems a bit odd to point the finger at us as individuals though and not the community as a whole?
Sure, the argument about encouraging others is valid, but it is as valid to all members who are frequently participating in the community I think.
I (and probably all moderators) tend to spend most of the time in the community with handling flags, edits and other administrative tasks like converting answers to comments etc. This steals focus from taking an as active part as I sometimes wish in answering questions and voting on questions and answers.
When I do up- or downvote I want that vote to be based on my true feelings on the topic or the specific question. Very often I lack the time to reflect on the questions in that way, but when I do I surely up- or downvote it.
I know, for me, I tend to vote on answer much more than questions. Why that is, I have no clear answer, it is probably based on how I consume the site and use the content.