I have voted in every election I possibly could (municipal/provincial/federal) since I turned 18. I feel like it's important to always perform your civic duty and vote and make your voice heard, no matter how likely or unlikely it is that the candidate you voted for will win.
I like to vote whenever I can, even if I don't care too much about what's going on. I remember a lot of people were complaining about the candidates of the 2016 election, only to say that they didn't vote, so I can always say I'm not one of them, if nothing else.
In Australia it's against the law not to vote. Even if this was not the case I'd still vote. Too many people have died protecting my right to vote so I will not let their sacrifices go in vain. Even though I have no choice, I still proudly vote and proudly take part in the democratic process.