Yes, I vote. As in the US, it is not compulsory in Canada, but I figure if you don't exercise that right, you forfeit the right to complain about the outcome.
I complain about politicians and the policies they enact, but I feel I have the right to do so because I exercise my right to vote. It really bugs me to hear people complaining, and then for them to say "I don't vote." If you don't vote, you don't get to complain. You had the opportunity to make a difference and you chose not to take it. And for those people who feel that their one vote won't make a difference, I say bull. In one of the last municipal elections in my area, a number of the wards' councillors came very close to ties -- every single vote mattered very much!