Touch Wiz? Wazzat? I have a Note 3 and I haven't seen TW since the first day I had it, unless someone asks a question here and I have to run TW to see what to tell them.
I always run
Nova Launcher, a lot of people here do also. But there are a few dozen free launchers. Install the ones that look good, keep the one you like best and look for icon packs and themes for it if you want. (I'm running Lollipop icons.)
Camera? A 35mm slide is about 1GP, and you can't blow that up to 8X10 without losing a lot. You're worried about the quality of a camera with 0.16 times the resolution vs 0.2 times? That's like a pail of water in the ocean.
Photography is 1% camera and 99% photographer. Ansel Adams, probably one of the greatest 2 or 3 American photographers, proved that with a Kodak box camera - the kind of thing you can buy for a dime at a yard sale. He took some fantastic pictures with it, just to show that it's not the camera. (Okay, so it cost about $5 back then.) Dorothea Lange used a Hasselblad, but it wasn't the camera that spotted those faces, it was Ms. Lange. I take pretty good shots with my 12MP Fuji J30. It's old, it's nothing special, but I understand depth of field, the rule of thirds, I know how to lock focus and/or exposure. Kodak has gigs of tutorials on line. Read them and the worst camera will take great pictures.
The only problem I have with HTC is the battery. If it goes into thermal runaway I'm going to lose a finger or two breaking the back off to get the battery out - or I'm going to watch my phone turn into a puddle of plastic.
I love the fact that HTC doesn't consider rooting or ROMing a reason to void the hardware warranty. They actually understand how computers work. But that's not enough to overcome the fact that I can't swap in a spare battery when I need to. (And I do use the S-Pen a lot.)
My only problem with a Samsung phone (I'm running the note 3) is that I'm on AT&T, so the bootloader is locked, welded, glued, mortared and shut off in every way possible. If not for Safestrap, I probably would have sold it and bought a TMO version long ago. (Last week I was playing with some ROMs, just to see if there was anything I liked. I bricked the phone about a dozen times. What a waste of an hour [less than 10 minutes to get back working each time]. Without SS? I'd probably be paying the copay for another phone. And it would have taken a day or two to reinstall all my backed up apps and data, even if I got the phone working.) But I still won't buy a phone without an external SD slot and a removable battery.