I love seeing my monthly summary for all of my accounts across every service I've used (except Blizzard, which their client doesn't store much anyways).

It's really fun tracking all of my achievements and playtime across platforms. Something I do wish I could see, though, is a grand summary of all of my accounts beyond the activity in the last month -- I want to see the total number of achievements/trophies I have, how many perfect games I have (counting just the platinum trophy in Playstation instead of 100% would be really neat). I want to see my total playtime and most played games of all time, at least for the launchers that track that data.

If we could even get more options for the time ranges such as data from the last 7 days, month, 3 months, year, and all time, that would be really awesome.

Basically, GOG has so much potential to give players a "universal profile" and I feel like expanding on profiles in GOG 2.0 would be a great way to achieve that.