Re: Iphone 6 vs LG G3 vs HTC One (M8) choise
iPhone vs. Android is like vanilla vs. chocolate - it's a personal choice. If you like the phone to be as it is, everything works - but you can't do too much "off the grid" with it, iPhone is fine. Same thing if you don't want to learn anything about using your phone - it's just a phone, with apps, and the phone and the apps work.
If you want to experiment, if you want a little laptop that also has a phone in it, if you want off-the-wall apps (written by off-the-wall people), go for Android.
As far as G3 vs. M8, I have 2 rules (one of which I may be forced to give up in a phone or two):
1) My phone must have an external SD card. (It can be internal to the phone, but it has to be one I can buy and plug into the phone.) And I'd like to be able to keep doing that until cellphones are as storage-expandable as desktops. I can put a 6TB drive (wait for a 10TB drive soon) or 3 into my desktop any time I need more storage. I can put A 256 GB card in my phone (as soon as they're made). I don't want to have to replace a perfectly good phone because developers have found sloppier ways of developing apps, so they get larger.
2) I will never buy a phone with a lithium battery that's not easily removed. Lithium batteries can still overheat to the point that they can weld steel. As soon as I feel a phone trying to heat the Superdome, the back comes off and the battery hits the ground (and I look for a car or truck to put between me and the battery - they can (although it's very rare) explode. I'd rather spend $30 on a new battery than fight the phone manufacturer for a new phone for a few months. (And $30 is a very high price for a good cellphone battery.) I'd rather wait for a newer phone from a different manufacturer than buy the best one out there now that has the battery sealed in. (Not only "rather" - I just won't buy a phone with a non-removable battery.)