I've been a fan of HTC phones for a decade, but was honestly willing to give Samsung a shot. Based on what I've read and seen in reviews, I'll be sticking to HTC. Here's why:
First and foremost is the camera. There's no replacing a dedicated camera button, and the fact that you can go from the phone in standby to taking pictures almost instantly is critical for anyone who has "missed the shot" because they were unlocking the phone, launching the app and waiting for the focus and shutter delay. I also think its a poor design on the gs3 that you must go into a menu to select burst mode. Again, that's not going to help catch those quick shots. I love that you can just hold the button down on the evo for picture bursts. I also read about a 20 shot limit to the burst shot feature on the gs3, I don't recall seeing a limit on the evo, although I'm not sure if there in fact is.
Next is the UI. Touchwiz is remedial, and according to the reviews Sammy has done little to improve it. This is a subjective area, but I have always preferred sense, and given that the new evo has the best version of it yet is a plus.
The screen is better on the evo.
Metal vs. Plastic. I choose metal.
I love the kickstand on my evo 4g, so I'm glad its even better one the 4GLTE.
Release dates...this is America, I need instant gratification, don't make me wait!
While watching the launch of the GS3 and reading the reviews I thought some of the features were cool, but the more I thought about it, the more they seemed gimmicky. To be specific:
The camera keeping the screen lit by watching you. Sounds cool, but I can't think of any time I'm using my xoom or my evo that the screen going dark has been a problem. Don't the apps usually address that?
The voice control. This is cool and probably a more seamless experience than having to launch an assistant app, but honestly I don't use voice commands that often. It's pretty rare that I'm in a quiet place with nobody around to think you're talking to them. Hell, I'm in bed right now typing so I don't wake my wife up.
The removable battery. OK, I know I am setting myself up to get flamed here, but the truth is that I have 3 batteries for my evo, and almost never take the time to charge and carry the extras. Don't get me wrong, it would be great to have the option and the gs3 wins here, but given that I rarely use an extra battery with my evo 4g, it becomes almost a non issue with the vastly superior battery life the new evo should have.