I'd prefer Termina. MM was my favorite game, and I really liked the landscape of Termina. It's not like I'd need to worry about the moon anyway, the awesome Hero of Time would come by to take care of it
As Malon stated, it's not
prone to falling, it was just that once when HMS crossed over dimensions and brought an item of unlimited evil power to that imp...
I wouldn't want to live in Hyrule under evil rule. Obviously Ganondorf wouldn't just go killing random civilians willy-nilly, but if you remember, things were still pretty bleak, and I wouldn't want to be ruled by someone who was evil, anyway.
Whereas in Termina, if the moon falls, everyone dies.
Naw, the moon crashing would be a pretty awful, but it wouldn't cause planetary devastation. Sure, Clock Town and
perhaps some of the surrounding area would be ruined, but you could still go on living just fine. The size of their moon was more like a large asteroid, and at the speed it was going, it's unlikely that much real harm would come besides those who were directly under the crash zone.