I miss the days of the Arcade. You're never going to experience anything like that anymore, until holodecks become real and remain very expensive for the average Joe.
I miss the days of deaths on the road. I don't know if numbers are tweaked when it comes to asphalt related casualties, but the speed limits are really becoming retarded, because some idiots can't behave themselves. Of course, these speed limits only apply to the people, not those who govern (they don't care about limitations, and change drivers as soon as they need to until the next one looses his/her driving licence, because he/she didn't want to loose his/her job).
I miss the 70s. There was much more snow during winter then.
I miss the days when I could say this is shite and not have a legion of dogooders telling me judging is morally bad.
I miss the days of Turrican II.
I miss the days of video gaming experience preceding the one above.
I miss the days when Hollywood seemed to deliver more original content, not prequels, sequels, remakes and other countless adaptations.