I bought the regular 6 first and then bought the 6+ for my wife and son a few weeks later when it came out. I then traded my 6 for a 6+ shortly afterwards.
My family thinks I have a mental disorder when it comes to phones and cars. (I tend to change both very frequently). I just tell them I'm supporting the economy in my own way
But in all seriousness, really like the plus. I bought the 128MB version so no issues with space. My only challenge was reaching the top of the screen with one hand. I got used to the home button double-tap so it helps. And I purchased a Mophie case which really added to the bulk. Since then (a week ago) I have put the case up for sale, purchased an Otterbox Symmetry and an external Mophie Power Pack.
I use my phone quite a bit as I am always on the road for work, so my only gripe is battery life. I am at 20% by 4:00pm after a nightly complete charge.
Otherwise love the phone. Have had every version of iPhone since the first one, and this is my favorite.