Which one are you most excited for? Watch Dogs and GTAV are two very different games with very similar qualities. They are by far the two most anticipated open world games of the year. One is a new entry in a already established, and very iconic series, while the other is a brand new game created by the third biggest corporation in the gaming business. It's looking as if both games will be absolutely incredible, and I'm excited to see how the union feels.
I'm personally more excited for Watch Dogs. I've always liked vigilante stories, and love stories which involve constant surveillance. Watch Dogs is like a dream come true for me, and I cannot wait to play it. I've been excited since it's first preview at E3 2012.
Edit: At a later date Saints Row 4 was included into the poll.