Hello,
I haven't had any problems with 10.2.3 that were related to the OS. I've had some programs crash here and there, but that's pretty normal. Word likes to crash, but auto-recovery works well, so I don't usually lose anything. Yeah! I guess MS knows their stuff will crash, so they have a contingency plan.
Under 10.1.5, my computer would not like waking up after she put herself to sleep. Now I don't let her go to sleep on her own, anymore. I tuck her in and close her lid and she goes to sleep. Then, after a while, I quietly wake her up and she's ready to go.
I guess if she doesn't get tucked in, she wakes up all grumpy. Come to think of it, I think my wife is the same way.
James