I have been using Google Music (on many different devices) since it began the beta, and I have never once seen this happen.
That's the whole point of a security lock....so nobody can see ANYTHING in the phone without having the pass to get in it.
Different apps blink different colors. Also, you can customize the light to be whatever color you want for a particular app. As for seeing more of the notification, that's a part of jellybean. BTW, you can control what app gives you notifications. All you had to do was go into that app's settings and enable/disable it. It sounds like you simply didn't take the time to learn the new platform.
The magnifying glass in iOS is nice, but the bars on Android work just fine. You just have to adjust to a different way of doing things. Android isn't iOS. If you're looking for iOS' way of doing things, then don't look at an Android device.
I use the Ice Cream Sandwich keyboard. That keyboard is WAY better than the GS3's stock keyboard, and WAY WAY better than the iOS keyboard (which flat out sucks).
All you had to do was tap it, and it would have asked you what app you wanted to open it with, and you could have selected Kindle. Again, you have to get used to a different way of doing things when you change operating systems. It would seem you simply weren't very knowledgeable.
I've never on any Android phone EVER seen anything like happen after taking pictures. Perhaps you had the "group by" setting set to something other than time. I'm going to go out on a limb and say this is probably another user created "issue" stemming from not being knowledgeable.
You could have just simply changed to a launcher that supports that. Again, you weren't knowledgeable.
Agreed.
You probably have some things draining your battery. Considering the lack of competence (I don't mean this as an insult) of the platform you've displayed thus far, is highly likely you're causing your own issue. My battery EASILY makes it through a day of decent use. I have had days where I had 5+ hours of talk time, 2 hours of screen time, had all radios on, and the battery lasted me 15 hours.
Runs perfectly smooth for me. I'm going to take a guess and say you probably had power saving mode turned on, which underclocks the chip. Again, this is a user-caused "issue", stemming from you not being knowledgeable.
A different OS, things are handled differently.
There are other apps just as good or better than cyclemeter, for example Endomondo. Carcassonne is available.
All in all, it seems that the majority of your issues were caused by you. Most of it seems to stem from you not being familiar with the OS and not taking the time to be knowledgeable enough. Changing OS' is a big change and you have to learn how things work. It's easier to go from Android to iOS, because iOS does less, but there's more of a curve going from iOS to Android because you have to adjust to you controlling your experience instead of it being dictated. I don't mean this as an attack or anything but, the bulk of your list could easily be resolved by you becoming competent with the platform.