When I lived in India, I never voted, never felt like voting either because the options were far right corrupt goons or center right corrupt goons. And I believe it's the same in US.

Now that I live in the Netherlands, I can vote for SP or Pirate Party or PvdA or Green Left. I actually have parties with whom my ideologies align and I can vote for what I feel. And I already did once.

The debate isn't as black and white. In a system where electoral systems are relevant and reflect your beliefs sure go ahead and vote. But in places where this isn't the case, I don't see how voting is useful or fulfilling.