Cephalization
There seems to be an evolutionary blueprint were almost all species have major sensory organs located at one end of their bodies, regardless of other vast differences in biology. Whether this "design" is limited to earth bound organisms is debatable.
Certain biological traits lend themselves more to tool making than others. Specifically the opposable thumb. Tenticles and elephant snouts are not as up to the task.
The universe is vast, and aliens would undoubtedly be very strange, but it seems unlikely to me that we are the only species in the universe that would exhibit the biological traits earthlings have.