The main thing is collecting furniture, decorating your house, talking to your neighbors (they tend to say the same thing but every once in awhile they say some pretty funny new things), catch bugs, fish, find fossils, donate to museum (paintings, fish, bugs, and fossils) and upgrading your house. You have to plant exotic fruit trees (to sell exotic fruit, worth more than the fruit that your town starts with), fish, catch bugs, sell fossils, sell turnips (turnip market is where the real money is at).
I like it because I like fishing, catching bugs, and collecting furniture. However, most people either really like it or don't like it. There are many more things to do such as design patterns to post on flags or ground (love making Nintendo patterns), planting a bunch of flowers to make hybrid flowers, and many more things. It is a shame that they took the NES games away from WW and CF (because they would rather make the money selling them on VC). The original GCN version had NES games to collect which was pretty cool. They had Punch-Out!!, Balloon Fight (my personal favorite), Clu Clu Land, and many more. So if you aren't into online play or can't get on WiFi then you should maybe check out the GCN version since it has the NES games.
