My Favorite Heresy

OK, I do not have a favorite heresy but catchy blog post titles attract readers.

What I want to ask is there a theological position that has been held to be heretical that you struggle with? Ever had doubts about what is called heresy, thinking it made some sense?

As far as the Trinity goes, let me briefly describe a few of them:

• Arianism-the Father created the Son (the only begotten Son), and created all else through Him.
  
• Modalism-God is one Person who appears in three different modes depending on times and circumstances.
  
• Sabellianism-God as Father in Old Testament, Son in the Incarnation, Holy Spirit after Pentecost.
  
• Adoptionism-God adopted a human Jesus, deified Him at some point and made Him Lord over all.
  
• Subordinationism-Jesus is eternal and divine, but not equal to the Father
  

These are the briefest of summaries. We could go on, both on the details of each position and coming up with even more positions. Another topic for another day, maybe.

Does it trouble you that any of these are held to be false?

Do you have a favorite heresy?