Well, over three or four advancement periods, I didn't do very well. I had a nice post about this saved, but Blogger lost it. Thanks.
I was brought in as an emergency catcher once. Catching is interesting, but as in the field, MLB 10 doesn't want to burden you with what you should actually be doing. For example, on a ground ball to the left side, you aren't supposed to back up the throw to first, even though the sim catcher does. You should stand at home plate in case, well, I don't know.
Anyway, I got pushed back to a backup role, then started again almost immediately when a guy in front of me got hurt. And now I failed at another set of goals (although I am hitting better), but they don't care as much because I'm just a "backup".
Sometimes it's interesting to see the different areas in which you're expected to improve, but honestly they're all pretty much related. If you do well, you can improve just about any attribute; struggle, and you'll not get enough points to improve your attributes. Basically, the more goals you have, the greater success/failure you'll have.
It's fun so far, and I'm learning about how to do things, but I'm not making a lot of progress yet. Maybe next year.