I don't know too much about Klonopins but the only thing I can think of is potential addiction... That stuff can get really addictive and has pretty bad withdrawal too.

I am not an MD or Psychiatrist so don't take what I say as gospel. My understanding is that it's not advisable to take it long term due to the potential for addiction. I was on it for over a year to help me sleep at night and for Generalized Anxiety Disorder with episodes of panic. I honestly didn't have a problem with being addicted and was able to stop it immediately when I became pregnant. Stopping quickly like I did is usually not advisable.

If the medication is working for you, great! It's really hard to find medication that helps us. You really don't seem like a high risk patient (addictive personality) in that you can skip it on days where you don't need it. Your doctor probably senses that and that could be an additional reason why he is continuing you on the medication.

Good luck.