Finally finished Mass Effect 2...47th Platinum now...Definitely got sick of the game in the end though.
Insanity mode is pure bullshit, probably the worst, highest difficulty level of a game I've played since World at War...There's definitely a difference between challenging and just pulling out every cheap trick to stop the player (bollocks 1 hit deaths and enemies popping up behind you, being the main culprits).
I also had to speed run a 3rd playthrough because the Long Service Medal trophy didn't unlock, even though I had already beaten the game twice with the same character
I did plan to move onto Mass Effect 3 straight away, but I think i'll violently vomit if I as much as look at the box right at this moment...I planned to get Mass Effect 1 at some point, but I heard it's quite shit to play retrospectively because it's such a step down from 2 and 3.