Before I start if you are planning to buy iphone 6 plus or any other iphone. please do not buy 16 gb variant .
I am using my 6 plus for last one year and believe me your storage will exhaust in a month. 16gb is not a good option to buy. go for 64 or if possible 128gb. as this beautiful phone will going to stay with you for long period of time. and for that you need lots of space for your pictures and videos.
if you like video shooting then go for 128gb as slow motion take most space while shooting them. and slow motion on iphone 6 plus is awsome.