I'm about seven hours into Mass Effect 3 now. I like the tone that the game's taken on. It's grimdark, end of the world shit, but there's a lot of humor and lightheartedness, depending on which planet or ship you're on. For example, when you're on the Normandy it's very serious, lights are dimmed, sense of foreboding. When you're on the Citadel, however, it's very bright and serene, and you mostly see the effects of war, like refugees, clogged hospitals, and so on. Leveling is leaps and bounds better than ME2 and importing a level-capped character that's been through the previous games really gives you an edge (I think you start at level 30 out of 50 if you hit level 60 in ME and 30 in ME2). Gun customization is back, much to my liking, except now you don't have twenty of the same mod clogging your inventory. Plus, most of the mods change the appearance of your gun, so you can have a sniper rifle with a bigger scope and barrel. Because scopes and barrels are directly proportional to Shepard's DIIICK.
Also, the new squadmate James Vega doesn't make me rage as hard as I thought I would. He's pretty useful in a fight and isn't all that aggravating in conversations.
Now some complaints: