It boils down to what you want the camera to do and how you plan to use the pictures afterwards. M8 is a typical HTC camera - good enough for causal shots and posting to social sites like WPCentral. Chregu has gotten some nice shots from his 8X in the past and should be able to get similar shots from a M8. Now if you're the this pe to crop and do post production, this is where HTC's camera isn't as good. The G3 gives you more to work with. Personally, I like the Sense skin better as even though the Optimus UI has gone with the flatter look, it is still kinda busy looking. That's why I said if I got a G3, I'd change the launcher instantly. I like the screen because for my eyes I like the cooler look because it is easier for me to read in the dark and for longer periods. I love the buttons on the back because it makes you realize that on an Android phone you really don't use those buttons as much.
Hopefully Chre gets a chance to see the screen for himself. Even though at this point I wouldn't buy one, simply because I'm already committed to my Z Ultra (that's the only reason), if I was in the market for 1 phone, I'd get this and maybe keep my 925. The hardware really, really nice and impressed me.