Voted for Other (please specify).

There is the Drake Equation and the fact that blue algae existed as soon as the earth was a few 100 million years old but it took another 3 billion years for complex organisms to develop.
This leads me to believe there must be or has been one celled life somewhere.
The chance for intelligent life in our galaxy - besides earth people (feel free to insert a joke about humans here ;) ) - is slim.
In the unlikely case they do exist I hope they don't find or ignore us.