I was never comfortable with the Trinitarian model, and I hold another view, but I actually most appreciate what DaveB said here,
This is not actually a big deal for me now - I worship God the Father through the Son Jesus Christ, with the help of the Holy Spirit - and the sophisticated metaphysics that become a measure of one’s Christianity is, for me, if not trivial, then superfluous.
What if the truth concerning the actual construction/relationship between the Father, the Son and the Holy Ghost, in all reality transcends our definitions, resulting in endless debate without possible resolution It might make sense that God is not as concerned with our understanding and defining the details as we are. Where God has purposely left some fuzzy edges to confound us, and even possibly judge us(in the kindest discerning and exposing way) as to whether being correct is as important as we think it is, or even possible, and how we deal with each other over the question of it.
Having studied intensely over the years with Modalists and Unitarians and Trinitarians, I have always gotten a kick out of the evasive maneivers necessary to fully embrace any of those positions in their particular orthodoxy.
I am by no means saying I fully understand it, I am unconvinced it can be, or even should be, fully understood- but I am nevertheless completely thrilled when I get to munch on it with an educated and open mind.
That God would be so indifferent to such an understanding as to leave it for a few centuries out from the new-born church to extrude a detailed definition of it, and then make that (the result of a centuries enduring intellectual and political wrestling match) a salvation essential doctrine makes me wonder if a less impirical approach is preferable to Him. One with a little more child-like mysticism allowed and even appreciated. Jesus spoke of it in a manner destined, and probably intended, to leave a fair amount of room for reasonable, conscientious, differences of opinion.
One thing I am sure of tho. As soon as someone begins anathematizing people over the mystery of the Godhead- whatever their view, they have probably got a spiritual problem much more serious than mere doctrine can resolve.