The best game of the trilogy and one my favorites.
I think it improved on the first game in practically every aspect, gameplay included. However, where I think the game really shines is in the writing of the characters and Shepard's relationship with them. The loyalty missions are great, and getting to know each companion on a deeper level adds a lot to the game. The romances are surprisingly fleshed out too, with several characters available to choose from.
Overall a good game, a great RPG. Most missions are action-packed, the final one is cool as shit.
Soundtrack is also very good, but that can be said for any of the ME games.