Omg this game...OH MY GOD THIS GAME...
So, this game has been consuming me basically since the day it came out. I've logged just over 80 hours into my two different save files now and am still going strong, in fact, the 3DS is in front of me as I type this =P I think it's safe to say I'm addicted to this game, which is kind of weird as I've played other FE games and honestly I wouldn't say I liked them over other SRPGs I've been into like Shining Force series, Disgaea series, and Final Fantasy Tactics...but I think this game has shot up into my number 1 favorite SRPG, pretty easily.
I think probably the biggest factor in it's addictive nature is building up your army and the often funny and sometimes touching support conversations as your characters build up relationships on the battlefield and eventually get married and have a kid...who you ALSO can get into your army through events later in the game. The build upon THAT aspect, the kid inherits skills, stat growths, and available classes of the parents, which has made me obsess over getting "the perfect kids" as much as possible. Why all this building up? Well, aside from the fact that they're adding content over time that will get increasingly more difficult to the point where you NEED godly characters...there's also the fact that there are spotpass teams of varying difficulty, and you can streetpass other people's teams to fight as well. So of course, this makes me want to build up the most broken team possible lol.
It's still early in the year, but I honestly think it'll be pretty hard for another game to top it as my game of the year. There's just so much great about this game =P