The bench. It was a most comfortable place, and the only place that Gregor could really consider a location of solace right now. Away from all the people who looked upon him as some sort of horrendous monster, anyways. The only person that seemed to treat him as an ordinary individual for any length of time was that Quarian he had met. With such having been the case, he now sat on the bench, contemplating the meaning of life.
To humans and other sentients, it likely was a most obvious thing - they were there to enjoy the fact that they were sentient, cognitive beings capable of understanding their lives and making choices. Gregor, however, had not been free for more than a few months - he still had no idea as to his purpose in the world.
And thus, he sat, awaiting the next series of events.