So first impressions of the Galaxy S6:
-Fast, but...
-World's worst text messaging app. Have a bunch of old texts on your phone? It's like taking a typing class in 1990, i.e., type your message, and wait 10 seconds to see it. Apparently a long-term problem that has yet to be resolved. Already dumped it for a different text messaging app which works fine.
-Holy bloatware. Between Samsung apps, AT&T apps, and all the Google shit, the phone felt like a damned Geocities webpage when I first used it. Some of it you can't get rid of, only "disable" it. Starting to feel like all of the Google shit is just as bad as Apple.
-The menu navigation is meh at best. Some settings are in-app, some settings are from one of many screens in the settings menu, not much rhyme or reason as to which. Default for all the software is that EVERYTHING gives you a notification, and I did not see a way to default to off, then turn back on the ones you want. So it took forever to go down the stupid list to turn off all the bullshit app notifications. It was also auto-installing all the apps on my Google account, which ROYALLY pissed me off. I had a bunch of stupid games on my tablet that I have no interest in having on my phone, and it took the liberty of installing all those when I wasn't watching...
-My email is acting quirky. There are a multitude of "sync" settings. Desired output is that I want only my work email to sync/refresh real time, and the rest just when I check on it. Took forever to figure out that the "master sync" defaults to off when you get the phone, and is not where you'd expect to find it.
-The camera is pretty awesome for a frickin' phone.
-I HATE the fact that you can't (or at least I can't figure out how) have stuff "wake up the phone" for visuals. e.g. - on an iPhone, the phone would "sleep" with a maps app, but when approaching a turn, it would wake itself up, give you a voice instruction and visual, and then go back to sleep. Best I can tell, the Android phones don't do that? (If you know a workaround for this one without a third party app, please let me know.)
All in all, impressive piece of hardware, not enamored with the UI. I much preferred the OS on my Nexus tablet to this.