My boss was extremely generous and kind. The on-site amenities were unbelievably cool. We (the other interns and I) were granted a lot of autonomy in our work, and I appreciated that trust that the company had in us.
What I wish was different
I wish I had been further along in my life (owned own car, had more versatile experience, etc.) at the time of the internship so I could have taken more personal initiative. It was a very early time for my internship.
Don't let good opportunities pass you by. When a good one comes along, take initiative and don't be scared by your own progress.