I knew many of them. Some in my own family. They were the ones considered spiritually weak because they:
-struggled with putting in field service time. What time they did put in was usually by being the silent partner with someone who did the talking at the door.
-found it almost impossible to be in the TM school. A Bible reading at most and this took hours of preparation and needed assistance in developing an intro and conclusion. Then they were almost physically ill when the time came to get on the platform, many times calling in 'sick' at the last minute.
-never raised their hand to answer a question.
-never conducted a home Bible study.
-had been in the org. for decades but could no more explain a WT doctrine than they could fly, i.e. the Gentile times, any of the Revelation interpretations, etc. even if they had just sat through the WT or Book study in which it was laid out.
-were very uncomfortable with minor responsibilities like carrying the microphone or assisting behind the lit counter.
BUT - they were absolutely extreme when it came to-
-refusing blood transfusions for themselves or their children. Seeing it through to the point of death or 'kidnapping' their infants from the hospital. You would find many court orders that were imposed involved this type of JW.
-going to prison over the draft issue, doing their time and coming out and resuming their marginal status.
-shunning DF'd persons beyond even what the WTS required, especially if it was their own family members to whom they could be downright cruel.
Well, you get the picture. Ever observe this yourself? I have a theory on where these people are coming from. What's you're take?