I'm excited about the new AC for sure. I am, however, cautiously excited. I was in love with the GC AC, really enjoyed the DS AC since it was AC on the go, and had some fun with the Wii AC. It just felt like the games never really advanced beyond the "original" on the GC. I'm going to be really let down if the 3DS version is more of the same with some mayor duties/rights thrown in.
I was hoping the DS version would incorporate some multi-player games or activities. AC seems like such a social game, but actually playing it feels like such a solo experience. I hope the 3DS AC will have some sort of games we can play with other people, even if it's something simple like hide and seek or tag.
I also think it would be great to be able to play your 3DS Virtual Console games in the new AC, which would be a nice homage to the GC AC and how you could play NES games.
I remember how excited I was for AC on GC. I went nuts when I read that certain Blockbuster stores had copies of AC 1 week before the game was released. I called around town and found a store that had a copy and immediately raced over there to rent it...the last time I ever rented a game I believe. What fun :P