I have gone thru all 3 games and have reinforced my assessment that the ME trilogy is the greatest game series ever. The remaster finally fixed the CTD bugs that plagued the originals. True, the graphics and animations are not up to current standards, BUT they are improved, contrary to some reviewers. Sadly, they did not fix the "CMDR Shepard looks like his arm is in a cast" appearance when drinking with Dr. Chakwas LOL.
I really enjoyed going thru all 3 games with the improved continuity built into the launcher and character creator...it feels like an even more cohesive, epic story. They made it so that your character looks nearly identical in all 3 games. One thing I wish they had done was make it possible to import an ME1 character into ME2 and change the class but if you can do that I have not figured it out. I believe you have to create a new game to select a different class.
I dont plan to ever go thru ME1 again because they did not improve the Mako enough and it is still like driving a giant beach ball when trying to climb hills. It is a shame you are forced to use the Mako in many ME1 missions because it ruins the experience for an otherwise excellent game.