I used to have one, so I'll give you this advice: Be careful. A lot of people in that community are nice and don't cause a lot of problems, but there are still quite a number of people who will be rude and hateful for almost entirely no reason. When Blanca came around for April Fool's Day, there was a huge argument about their gender, and there was a constant debate about Gracie's gender even though their gender has been different depending on the region you bought your game from.
A lot of people are racist and homophobic, and I guess if that doesn't bother you, go for it, but my advice is to really, truly be careful who you talk to because a lot of the people in that community are nice but just as many are hateful and rude and will ultimately make playing the game a hassle. I stopped playing for several months because the community on Tumblr was just so hateful. The community on TBT has proved to be much, much nicer.
EDIT: Not to mention, there are several gossip blogs centered around ACNL players, and you WILL end up there at some point. Everyone does, and it's never nice.