I got both the 6 and 6 Plus right now. Every time I pull out the 6 out of my pocket I can just use it like a regular iPhone. Every time I pull the 6 Plus out of my pocket I instantly notice the inconvenience and have to think about working around it; like trying to focus while taking a picture in one hand. IMO keep the 6.
I agree it's interesting that you never see anyone with a 6 Plus IRL but that's probably for good reason.
In San Francisco I see more people with Pluses on public transport than 6's. Interesting to hear that others aren't seeing Pluses.