I simply see reading as this:
Basically the ability to process a pattern correctly in the amount of time you have before you have to execute it.
This is why when you can read AR10, it often makes maps easier to read, as the complexity of a pattern is reduced by showing only 2-3 notes at a time, resulting in much simpler and recognizable shapes. And when you can't read AR10, you don't have enough time to process the simple patterns correctly, which results in misses, bad accuracy or supershaky cursormovement from you rushing into the pattern.
Missing or bad accuracy from reading incorrectly might often be clicking on a note you're not supposed to, or reacting late to a note resulting in rushing and therefore misaiming or bad accuracy.
When you've read a pattern, say a square, correctly, and you still miss, then that's a problem with how you draw out the square shape itself; your aim.
Similarily, if you read a stream properly but still get bad accuracy, that's probably because of bad finger control, while not reading a stream properly might result in you basically starting the stream some ms. late.
Anyhow, for the actual topic:
I'm one of those guys who never actually bothered to learn AR10 until recently, so any AR10 scores I've set until about december 2014 has been semi-memorized. Generally what I'd say is useful is a good fundamental of other skills, so that even if you're late to reacting, your aim is still good enough for you to not miss a note or something. This way you can slap HR on a wide variety of maps and have fun with them without it getting too frustrating.
Alternatively, screw learning AR10 and just memorize like I did \:D/
Basically the ability to process a pattern correctly in the amount of time you have before you have to execute it.
This is why when you can read AR10, it often makes maps easier to read, as the complexity of a pattern is reduced by showing only 2-3 notes at a time, resulting in much simpler and recognizable shapes. And when you can't read AR10, you don't have enough time to process the simple patterns correctly, which results in misses, bad accuracy or supershaky cursormovement from you rushing into the pattern.
Missing or bad accuracy from reading incorrectly might often be clicking on a note you're not supposed to, or reacting late to a note resulting in rushing and therefore misaiming or bad accuracy.
When you've read a pattern, say a square, correctly, and you still miss, then that's a problem with how you draw out the square shape itself; your aim.
Similarily, if you read a stream properly but still get bad accuracy, that's probably because of bad finger control, while not reading a stream properly might result in you basically starting the stream some ms. late.
Anyhow, for the actual topic:
I'm one of those guys who never actually bothered to learn AR10 until recently, so any AR10 scores I've set until about december 2014 has been semi-memorized. Generally what I'd say is useful is a good fundamental of other skills, so that even if you're late to reacting, your aim is still good enough for you to not miss a note or something. This way you can slap HR on a wide variety of maps and have fun with them without it getting too frustrating.
Alternatively, screw learning AR10 and just memorize like I did \:D/