I became Orthodox in part because of 'Our Life in Christ." It's not only 'good for Evangelicals," as someone so casually dismissed it, but it is also helpful explaining the basics to agnostics: it worked for me. I'm here.
I also like 'Steve the Builder' for its sincerity and homely truth. Steve Robinson's angle on things is intensely personal and sometimes evokes tears. He is a devout Christian who never attained his aspirations in the church, and he makes you love him. He's a natural observer and writer.
Gotta watch out for Jeannie's theology; that's all I've got to say.
Anything by Father Andrew Stephen Damick is excellent. He's very organized, very substantial, and very much to the point. He is worth every minute of your time. I've listened to his podcasts more than anyone else's except those of Kallistos Ware. AF used to have much more Ware a few years ago, and, frankly, I miss him. He has a singsong voice that takes getting used to, but he is very illuminating.
Father Thomas Hopko alway gets my click. He's very informative and comes solely from the Orthodox perspective. Occasionally, he gets a little too discursive, and takes a little too long to get to the point, but I'll forgive him. He's taught me a lot.
I also have enjoyed listening to Dr. Steven Khouri's series "Glory to Thee" on Byzantine Chant---I'm in the choir--and wish he would do more. There's precious little chant training material online, and his ministry meets a real need. He should do videos.
Last--but not least--I mention father Patrick Henry Reardon's podcasts. He has an extensive background in Roman Catholicism, monasticism, and Orthodoxy, and is an excellent source of scriptural interpretation.