Completely understand what you mean by that last statement. Quite frustrating not being able to pin down exactly what makes you tick vs what makes you tic, so to say. Honestly not sure what advice I can give you on this, as I find myself somewhat in similar circumstances (stutter + job haha). What I *can* say is not to give in to the despair. Keep interviewing, don't take it personal what strangers do/don't do, try take everything in stride. Most of those people you'll never cross paths with again, and if they can't see past this one thing, maybe best that you don't get to deal with them any more than you need to. My 2 cents, which I myself shall try to take to as well. Godspeed