I am 58 now!! Not 30's

then what is considered old

mm so far din happen on mine. Still running 4.1.2

Overall dun put too much hope on the camera. HTC do promote the ultrapixel capture more light compare to normal pixel but it doesnt said it come out nice.
Keyword : Capture more light = Brighter.

I know alot ppl has misconception on ultrapixel tod it will be best but in fact it is still a tiny 1/3 inch sensor.

yup sensor size and imaging processor play important role
Dun need APSC sensor..even if they manage put 1/1.7 inch (or 1/1.2 inch like Nokia Pureview 808) it will be my on the go camera adi 

It is alway up to u if HTC One camera can up to ur expectation
But with Zoe features, taking photo with ur family or friends become more interesting 

battery drain issue..
first... throw away mind set  of comparing to note 2....the battery on HTO is smaller than note 2 thus lifetime shorter
second, the phone is actually a heat sink...so the aluminium will disperse the heat through the aluminium, that is why u feel hot fast.... but actually it keep the internal good, i used to have sgs2, it is very hot when I use long and it was plastic but i dont mind, just put a case and it doesn't bother u much
third..turn on ur power safe mode, it will increase the battery life
fourth... close gps, bluetooth and wifi when no use, it eat battery damn fast
five.. LTE eat battery, so when you not require surf fast, or not your area no LTE, change the network setting to GSM / WCDMA auto or even better just WCDMA only
six...how many social media u have? the more it sync the more battery it eats
seven...how many hours you you on social media? if you continue for 4 hour straight, of course it drain fast, you need to post some more information, are you on youtube or streaming
eight.. have many cycle battery you gone?

My battery range from 6 hours to 13 hours average depending how long n how I use...i have damn a lot social media, whatapps, twitter, fb,badoo, tagged, twoo, tapatalk, viber, wechat, google+, kakaotalk, instagram, blinkfeed, 3-4 email sync..but i still manage 6 hours...way way better than my sgs2..
if you compare with iphone or note 2 or worst bb...you can't compare