The criticism I hear and agree with about the RCC(aside from infallibility and filioque ect) is that they are more dogmatic about many things that the EO church says either we don't know or its a mystery. much more legalistic about things that probably God doesn't either care about.
That is true. The more you study the history of the Church, the clearer that will become. And it's not just a matter of style, but of substance. One of Orthodoxy's big problems with the Roman Catholic Church is that its thinking has been contaminated by Platonism, which attempts to impose rationality on many ideas that are just not rational--their truth is too profound to be reduced to terms man can easily understand. The Orthodox accept, and respect, that. One side effect of legality is to make Christianity appear to be illogical, infantile and cruel, which puts people off. Orthodoxy is much more open to doubt, mystery, and metaphor and, consequently, appeals more to the thinking person.
So, no, it's not just a question of crossing left or crossing right. I would go so far as to say that anyone who converts, or returns, to the Roman Catholic Church after having been Orthodox has not been properly catechized; they have never truly understood the significant differences between the two churches and all that it implies. Both churches may share 90% of their theology, but they emphasize different things--and that emphasis is crucial. That emphasis is a whole way of looking at life and of looking at God.
And Poppy is incorrect: the Roman Catholic Church has diverged most from the original, not the Orthodox. Read up on your Church history.