I miss visiting macrumors and instantly reading mac related news and rumors, not iOS stuff.
I miss the old designs of the G3/G4 era. iMac G4, Cube, the Titanium PowerBooks, the clamshell G3 iBooks with their cool handle, the later G4 towers where every generation looked a little bit different. Apples designs impressed me much more back then, imo the machines looked more "creative" - especially when compared to the pc stuff back then. Nowadays a mbp doesn't look much better than a hp envy for example.
I also miss the necessary adapters being included when you bought a Mac laptop. For example until early 2008 they had dual link dvi ports, and inkluded a vga adapter. I could connect any monitor out there from 30" to a beamer out of the box. They also had decent screens out of the box. Nowadays I would have to spend around 250 bucks on top to get a matte screen and 2-3 adapters just to make the laptop work for me. That's a little bit crazy.