Do you actually go to Orthodox Church?
How are the services?
I go to a Greek Orthodox Church in my city and the service (called Divine Liturgy) is very beautiful, ancient, and traditional. Great people as well. If you do go, keep in mind that Communion is reserved for those who are baptized into the faith. The process of becoming an Orthodox Christian can be anywhere from six months to three years depending on the person, and I am in that process.
I go to a Greek Orthodox Church
Having to interact with Greeks might be a deal-breaker.
That being said, other than not having a Pope, what are the main differences between Orthodoxy and Catholicism?
Having to interact with Greeks might be a deal-breaker.
There are also Russian, Serbian, Antiochian, Georgian, and Ukranian Orthodox Churches out there, all of which are in communion with each other (besides the current political schism between the Ecumenical Patriarch of Constantinople and the Russian Orthodox Church).
Here are a few instances of Eastern Orthodoxy being different from Roman Catholicism:
The Holy Spirit comes from the Father only, not the Father and the Son. This is due to the Roman Catholics adding filioque to the Nicene Creed starting in the 6th century. The Orthodox believe that this messes with the hiearchy of the Trinity.
The Orthodox distinguish between God's essence (what He is) and His energies (His uncreated operations). Both are divine and fully part of God.
Instead of purgatory, there is theosis. Theosis is the process of becoming one with God by cooperating with His energies and the going through the lifelong journey of repentance.
The Orthodox do not believe in original sin/original guilt, but rather we just inherit the consequences of Adam's fall (such as corrupt human nature and death).
Married men are allowed to become priests.