I played from 2012 to 2015, but couldn't turn it in to a main source of income, just probably didn't put in enough effort. I thought I might take another chance. So to people who have been playing online poker since early 2010s or even earlier, what is the biggest change that happened in the game in terms of how people play (more TAGs, less fish, wider 3bet range pre-flop,etc.) and how games changed on major poker rooms(structure,user base, rake, etc.)?