For the most part I love the 6+ (Came from the 6 after 11 months). The screen and battery outweigh the Size for me. My fiancé has a 6 and whenever I hold it there is NO way I could go back.Going from the 6 to 6S Plus.
Part of me sort of regrets not trying it last year. Another part of me is afraid of not being able to get used to a smaller size in the future if it's too unwieldy. Hopefully the iPhone 7 is a nice balance between the two.
I am excited about the nicer screen and better battery life though. The difference in size is sort of like having a new form factor on the S cycle as well.