I only ever played through ME1, and what I remember loving most is checking out new planets and distress call missions.
When someone told me there's no aesthetic changes when you swap armor in 2 turned me off the game at the time. Same thing happened with Dragon Age2.
Looking back everyone says both games are great, and wiser me now knows aesthetic changes do not a good game make.
Right now hyped for the upcoming and final Binding Of Issac DLC, that game has been a part of my life for 10 years.
You should definitely go back and give it a shot, or try it in the remaster if you can! In my opinion, ME2 is hands down the best game of the trilogy. Best combat, mixed with my personal favorite stories.
As for Binding of Isaac, I know the game is iconic, and I know that it basically pulled both roguelike games and indie games into the spotlight by force, but I just cannot get into it like I did when it first came out. It just feels too stiff to me, especially when compared to other roguelikes in the same vein, like Enter the Gungeon. Don't let me rain on your parade, though! This is entirely just my preference, and I hope you enjoy that DLC thoroughly!
Personally, the next DLC I'm looking forward to is 100% Doom Eternal's Ancient Gods 2, whenever they decide to announce and release it. I'm still working through the first one, but it is so amazing I'm already anticipating part 2!