Moar impressions; it just keeps getting better and better, I need to wrestle myself out of my computer to stop playing, hasn't happened since I played Human Revolution at least. The soundtrack is absolutely top notch, Mansell found a great balance between ME1's synth and ME2's more bombastic orchestras. Atmosphere is very good too, you feel like this is a war, and an hopeless one at that. New characters are generally interesting; Cortez and Samantha are nice to have around, Vega is kind of a douche, but he's balanced by the awesomeness of the returning crew (Wrex stays on the Normandy! I mean cmon). The main quests got increased in depth, and many side-quests are also much better now, having a story weaved around them connected to the main plot and tangible rewards (getting the Claymore shotgun for my Vanguard AND meeting Grunt in one really well-crafted mission, whose existence depends ojn a choice made in ME1? Hell yes please).
Also, while this may not be TW2, actions and decisions do have consequences, moreso than in the first two games, noticeably in the form of War Assets. Past actions can increase or decrease the Assets you get, and you can sometimes choose between more Assets or more personnal bonuses. It's not game-changing, but there are many little touches.
Writing is also good, better than ME2 and DA2 at any rate. The Citadel has some true gems. I couldn't stop laughting at Blasto's show. You'll know when you see it.
Gameplay is really extremely good. Not repetitive at all, each mission has it's own gimmick that make it interesting, and it seems they all feature a new enemy or weapon. Variety is the name of that game. While the levels are certainly linear, many big rooms are very open, and the enemies will mercilessly flank you or spam greandes, or block key chokepoints with those damn turrets. Many things to look out for, I absolutely adore the high risk-high reward gamelay of my Vanguard.
That said, some things bug me. A few side quests are just about overhearing someone talking on the Citadel, going to a planet, scanning while avoiding Reapers (which is an annoying minigame, but at least it's much less tedious than farming minerals), probing the item, then speaking to the person again. Boring stuff. Also, EDI, and by extension Joker. Seriously, Bioware, was this really neccessary? What is this, Austin Powers? Also, the dream sequence with the kid? I know the stakes, every second mission has many people die to the Reapers. Stop hammering me over the head with the damn kids.
Still, very pleased so far, if this keeps up we have the best game in the series right here.