I visited the Villa Giulia for the first time in 1982, a couple of days before my eighteenth birthday. I had read the first five books by Livy and had become fond of early Roman history, which naturally drove me to a museum devoted to the art of ancient Etruria and archaic Latium. I still have some of the slides I made back then, but I do not remember much of my visit, except the double surprise that there was a picture of an elephant and that the building itself was a monument from the Renaissance.
Two years later, I returned with my father, and I remember (a) the excellent coffee and (b) that the museum was very, very big. It was too much to comprehend. On later visits, I started to recognize some system, and it seemed as if the size of the museum was, after all, limited. Still, I overestimated it; when I visited the Villa Giulia in 2009, I believed I needed several hours, but in the end, a couple of hours were sufficient to see everything and take photos.
The collection itself is beautiful, and explanatory notes are really good. I was impressed by the Pyrgi temple façade and the gold tablets, the statues from Veii, and the finds of Satricum. The only object I did not see, was the elephant, which happened to be on loan to another museum.
This museum was visited in a/o 1982, 1984, 2009.