How much does phone size matter?

Before I had my cataracts removed, size was about the most important thing. I couldn't see anything on a 3.5" or 4" screen.

Now that I have 20/15 vision, I think I'd rather have a Note-type phone (with my fat fingers, I need the pen) with enough internal storage, an external SD card slot and a removable battery in a much smaller case. My Samsung Precedent slips into a pants pocket easily, and I don't have to worry about breaking it when I sit.

Leebut, I use an Otterbox defender on my Note 3. It slips into a very strong belt holster and the phone is held very tightly. (It takes a little learning to be able to release the phone easily. My pants would fall off easier than the phone would fall out of the holster. And after having a few accidents with the phone, in which there was absolutely no damage, I don't want a phone without one. I've always preferred holsters since they were available (early in the century, I think), but the Defender is about the best I've had, and the case seems as it can take anything but being driven over by a car (or water - it's not waterproof).

I'm half way through my cataract surgery - one done last week, one to go. They did the bad one first of course, so no longer straining to read the screen. Used to be I couldn't take the eyestrain after about 10 minutes, and I agree that now that I can use it more a larger screen might be handy.
 
Making the battery "not removable" doesn't seem to be a big thing and the S5 isn't that far behind so if they did that with every other generation of phone where one had it and the other didn't then you could always pick and choose.

The need for USB3.0 isn't really a thing yet among the average users. I know us tech nerdy people love extra bumps in every area but not really critical to the sales of the phone. I would give it a couple more years at most before 3.0 will be needed.

I think removable storage is really helpful and keeping that is key. That is always the big win over an apple phone (besides the OS) to me. Making 3 different phones that have different internal memory only to have to spend $100+ tax for each bump seems silly when SD cards are much less then that to do the same bump. Thing is to not focus on the US market as much as the global market.
 
@darkman, it's good you found a solution with a case.

@bbtkd I never saw anyone in England using belt holsters, but over here in China I have seen a few. How secure are they?

Stopped using them years ago but I heard they look nice with pocket protectors, LOL. I have the Defender on my GS6 that is slimmest iteration thus far and goes in my front pocket of my pants and sits on my desk and center console in the car. If you don't want a phone to not break in your pocket, don't sit on it and keep it in your front pocket.