My favourite is the Beautiful Town, because you waste less time watering flowers and picking up weeds. Plus, who doesn't love a landscaped town with tonnes of pretty flowers? lol
I normally always pick Beautiful town, I have selected Bell Boom in the past but did not notice that much difference in my profits, and plus I can pretty much make a killing with fishing so I would prefer to be able to have BT running so I don't need to be concerned about watering flowers and the like.
My favorite town ordinance is the Beautiful one. If it weren't for it, my town would be a dead, barren wasteland. Keeping hybrids alive is much better than extra bells or extended times in my honest opinion.
My favorite is the Beautiful Town Ordinance. As others have said, I like not having to do much gardening and weeding, and I also like that I can leave my game for days at a time and still have perfect hair.
I voted for the Beautiful Town Ordinance because I love to see my pretty flowers enjoying the sunlight without withering away. Also, if you disconnected from ACNL, you wouldn't get the bed-hair.
My favorite is Night Owl because I like seeing my villagers awake later at night and it permits me to sell more bugs and fish in a night than I normally would be able to.
That said, I replaced Night Owl with Beautiful Town months back because I grew a lot of hybrids and didn't have the patience or time to water them all. Those reasons are especially important because when I play, I time travel because I find day-to-day less fun.