As the title says, I think it would be really nice if the Research Assistant used personalized results, according to the sites that have been pinned, raised, lowered, and blocked by a person. Perhaps this could be an option to toggle on and off on the Research Assistant page (and any others that use web results, but it seems to me that is only the Research Assistant).
I think this would give the user more control over their experience with the Research Assistant.
I wasn't sure if this was or was not already the case, so the test that I ran to see was: I searched for jobs in my field in my area. All of the results that the Assistant referenced were from Indeed. I then blocked Indeed and tried again, but all of the references from the Assistant were from Indeed still.
This was a slightly contrived example, but I think it demonstrates clearly how personalizing results could help the assistant with producing answers that I am looking for.