For me it’s the fact that it took me YEARS to git gud. Bought Demons souls before the hype, and had no clue. After a couple trys it went on the shelf. Went on to buy every souls game, cause I knew they were amazing, but never finished one or even got half way.

It was watching walk throughs, speed runs, and various challenge runs on youtube that, along with hours and hours of grinding, got me comfortable with these games.

Playing DS1 with fresh eyes and my current skills and knowledge of the other games would be amazing, as it really has the best world.

Having said all that, my answer is the Mass Effect trilogy.