Yep, i'm going thru it, too.
I started tail-in. Then went nose left. Then nose right. Then nose-in.
After I got nose-in down OK, I still did nose left alright, but nose right almost always soon ends up with a "dumb thumb" input and I have to whip it back to tail-in to recover.
I think I spent a lot more time with nose-left than nose right, because since I went directly from nose-left to nose-right, the initial learning went faster for nose right since I already had a side-in mentality. So it came quicker and I moved on to nose-in. But when I try to go back to nose-right, it's hard now because of the small amount of time spent working on it.
Some part of me also thinks it might have to do with helicopters normally hovering tilted. You get that picture in your head of what it's supposed to look like, and then when you turn it around, it tilts the other way and your mental picture gets screwed up.
Remember, it's the helicopter's fault, not yours!
yeah...