Lack of advanced graphics options. I want to be able to tweak the graphics so they run well on my computer without looking like crap.

Printer Ink and paying companies like Google and Spotify, who still collect your data as a paid customer.

Smartphones. The sheer fact that we're able to fit these cameras, computer chips, and everything else into these thin glass slabs is still mind-blowing to me.

An iFixit Pro Tech Toolkit. I can not even begin to count how many times it saved me.