I'm male 5'7 and i have small hands.
I tried the iphone 6 and it is nice. started using like my Iphone 5s one handed, a bit more difficult though but easy to get used to.
I wanted the 6 plus so bad though since i watch lot of videos (movies and youtube) on my iphone. i also do lot of surfing on it. The problem was since the 5s was small, i've never enjoyed it using for media consumption and long surfing session and i even abandoned gaming on it. To me it was just a phone with internet capability. I am one the people who were waiting for a bigger screen and almost switched to Android.
So for me with the iphone 6 i didn't feel like i had new product after 1 or 2 day. Like i said above i used it like my iphone 5s.
So i went to replace it for an Iphone 6 plus to try if i will like it even though i was worried about the size. Yes i admit it is much harder to use it one handed for me, it is less discrete than the 4' iphone 5S that's where the negatives stop.
As far as i'm concerned the iphone 6 plus is a new product that i enjoy using more than any previous iphone. Finally i enjoy streaming videos and movies on it, surfing internet is great, it is the first time i am happy with the battery life of an iphone, ever. I haven't game on iphone for a while and started gaming again on my iphone. It has the best camera of any iphone. Finally developers will make more polished apps for 6+, it has started already with some apps. For me Iphone is "an ipod, a phone and internet communicator" like Steve job said, i don't use it like a phone.
Finally think about it, do you need another iphone with a bit bigger screen, with almost the same experience as iphones before? If yes go with the 6.
Do you need a new product and you need to change a bit of your habits, like one hand use sometimes? Go with the Iphone 6 plus
Sorry for the long post, english is not my first language and everything takes me longer to explain
