Ah man.. where to start!
This game simply sucks you in... there's no escaping it! No plot, no story-line, no end! It just keeps rewarding you for doing things that you hate to do in real life!
I've nearly discovered all the fossils, but my fish and insect collections are really poor at the moment (it being winter in Animal Crossing and all).
I've also managed to get cherries and pears growing in my town without have to trade for them, which is really nice!
The game is addictive as crack and is designed in such a way that you want to play it every spare moment you have just so you can get certain things that you can get right away. It also plays in such a way that certain things you do today, will only reap rewards tomorrow (or in a few days), so you're always tempted to come back for more!
The "real-time" aspect is also fantastic and adds a lot to the whole experience, not to mention the special days events and the trading allowed through the password system...
To say that I love this game is an understatement!