Thanks to everyone for all of the suggestions and comments. I have finally made a decision on a new phone! : )
I have enjoyed Android, but I have decided to go with an unlocked iphone 5s for my second smart phone and move from MetroPCS to Cricket Wireless, as Cricket is offering a $100 credit to one's account if one moves from either Metro or T-Mobile. The $100 will help offset the $550 I paid for the 5s. I do not imagine that Cricket's service will be any worse or better than Metro's. If Cricket turns out to be worse then Metro, I can always move back to Metro next year.
I enjoyed my LG Motion (my very first smart phone) and will try to put it to good use per your suggestions, but I am looking forward to using the 5s. It should arrive one day next week. I am so excited to receive it and start using it! It should prove a good matching device to my MacBook.
I have been reading about how having the 64GB with the 5s is great for storing pictures, music, and movies. The pictures and music part make sense to me, but who screens movies on a screen that small? I am comfortable enough screening DVDs on my MacBook Air, which is only a 13+ inch screen, but I cannot imagine screening a film on a tiny mobile phone screen! How many of you use your mobile to screen films?? Do you not find it uncomfortable trying to watch a film on a screen that small??