Doctors and nurses are concerned about hypoglycemia, so the prefer to see higher numbers. Being in the honeymoon and making much of the required insulin reduces the risk of going hypo. I find having higher numbers makes control less stable and more difficult, so I aim for much lower numbers.
In answer to your question, no, hypos are the only potential problem if blood glucose is kept close to normal. Be aware, though, that repeated hypos lead to hypoglycemia unawareness.