I miss the days og seeing a side project site go from 0 to #1 or #2 on google for no reason.
I miss NETELLER — How nice was it to have all your banking in spot, with afiliate names listed. And it was all free with ACH to my bank that was also free.
I miss the Freedom in the US to gamble, not only did our revenue suffer I miss playing playtech and Micro games.
People – So many people in the industry are ufortunately gone now, some I am still shocked stepped out to early in my opinion 
Last thing, I miss learning how to do web pages, lol I had not a clue when i started, and it was fun to learn every day. Now I spen all my time fixing bad code i made years ago during that process.