None of them are really better than any others. I'm using Beautiful Town right now as it makes getting the Golden Watering Can much easier. After I get that though, I'll probably switch to Wealthy Town or Night Owl.
Beautiful because it makes everything convenient if you time travel.
Otherwise, I'd consider wealthy. I don't really recommend the time-based ones, because you can just go to someone else's town who has theirs open. (Assuming you don't TT, anyways) --- 3DS FC: 2707-1675-8615 (AC Town name: Swiftrol, Dream: 4400-2153-4454) AC:NL IRC Chatroom: http://tinyurl.com/acnl-IRC-chatroom