Super Mario Galaxy and Super Mario Galaxy 2. The defining games of my childhood.
The feeling and atmosphere of these games is truly unique. I don't know how to describe it, but there is absolutely nothing like it. And I don't mean just being in space or whatever. There's something else to it.
Its interesting that you find both of their atmosphere's similar. I actually like 2 a lot less than 1 because it's atmosphere feels kind of eh in comparison to the first.
The first definitely has more of it. I like both though.