There was a Zoom meeting recently that touched on reclassifying calls. It was the January Torch Network Live meeting. (If you are not yet a part of Sparks Sessions or the Torch Network, I highly recommend joining!) They recommended keeping it simple and having 5-10 "types of calls". I also believe there is a video in the training academy that dives into how to reclassify the calls and the importance of reclassifying them correctly!
If you haven't set it up yet, I recommend setting up different categories such as "spam" or "hang ups" as mentioned above.
I hope this helps you some. Let me know if you have further questions. 🙂