Well I don't think Catholics see it as a bunch of "rules," Dot, to be fair to them. They see it as a statement of the Catholic faith. If you open the Catechism, it doesn't speak of rules and regulations, that is canon law actually. The catechism speaks really of "this is what we believe...."
If I were to open an Orthodox catechism and it said, "we believe in a Triune God--Father, Son, and Holy Spirit, and in Jesus Christ being Truly God, Truly Man." and "we believe in the holiness and intercessory power of the Holy Theotokos and Ever-Virgin Mary," etc. you wouldn't see that as "rules" but rather statements of faith.
The Catechism speaks of things with definitive, objective morality like birth control. In the Orthodox Church you have bishops who are ok with it, most are not, some say very little about it. There is economia and no hard and fast declaration of the objective morality behind contraception. With Catholics, there is. It's not so much a rule, but a statement of faith on thie issue, theological definition. Or divorce, there is a firm position on it and an explanation as to why. In Orthodoxy, this area is much more lenient and an "ask your priest" kind of thing like contraception. So things differ there.
But overall you'd be surprised how much commonalities there are in the catechism with Orthodoxy. Abortion, homosexuality, inappropriate contentography, cohabitation, in vitro fertilization, masturbation, all the sins basically we see in Orthodoxy are explained there. And those are the "negatives," but the catechism always first mentions what Catholics AFFIRM before it announces what they reject.
It's not a total 100% guidebook explanation of everything Catholic. Take atonement---it never explains the different types of atonement and takes a position. We are left to do that. And you'd be surprised how many times the catechism refers not only to St. John Chrysostom and St. Basil the Great, the Cappadocians, etc. but it also mentions the Eatern Catholic rites a lot respecting infant chrismation and communion to children, etc. I was always surprised how much it mentioned the East.
It has footnotes to the Fathers throughout and Scriptural footnotes as well.
I think it does a lot to guide the faithful and keep Catholics looking to a shared Eucharistic faith rather than just throwing down rules. Now if you're talking canon law, wow, yeah, Catholicism is chuck full of 'em!
I think it's what you've been used to. My friend who is a devout Catholic has a hard time seeing how the Orthodox Church and all its Patriarchs and such keep everything together and going. She is perplexed by the fact that it can function without a bunch of rules. I think it's a testament to the Holy Spirit's guidance of the Church. I think there are plenty of dogmas and doctrines in the Orthodox Church to know where it stands on all issues. We are given the borders to stay within the life of the Church on these dogmas and such.
I just believe it's normal that you would feel that about the Catholic catechism and how you still talk about the RCC much and the things you like about it. You were one a lot of your life, so with Orthodoxy being newer, it'll take over a decade, imo, to get used to all that is Orthodoxy.