I forgot to name the reason why i hated ME2, though it doesnt really matter in this forum, there are split opinions about it, so...
ME2 got slaughtered in the ways of armor, weaponry and the entire galaxy got basically sliced in half. ME2 felt like a miniature version of ME1, the citadel alone destroyed the game for me. going from ME 1 to ME2 all i saw was limitations, cut downs, attempts to draw every single buck from the player with DLC's. Cheap solutions replaced what made ME1 great to me. Upgrades for weapons instead of adding alot of weapons, same with armour.
ME2 was one of the games that i anticipated and looked forward to the most, simply because the story was amazing in ME1 and i couldnt wait to see how it would proceed. Never mind that now, as i wont be buying ME3 >.<