I don't mind the derailing at all, it's the only way to keep this thread active.
I like to juggle between both SAI and PS too, but since I use PS a lot for university stuff, I used SAI lately just to look at a different screen. Been a while since I did a full PS drawing though, and that's why I want to go back to it.
As for the tips, it would be a bad idea posting your drawings around here, I still haven't seen how you actually draw, and don't expect me to teach you anything from zero, becasue the good old internet will be a better teacher than me. I can only go as far as to answer a few question from personal experience, I'm still learning myself