I first visited Kathmandu in 1990 and returned in the fall of 2007.
On my first visit the journey from Kathmandu to Bahktpur, was a short drive through open countryside, now the whole journey is through urban sprawl - a huge disappointment.
I was told, by our guide, that the valleys population has nearly trebled since the start of the Moaist insurgency. Due to people seeking the safety of Kathmandu. This is both a human tragedy, and a tragedy for our collective human heritage.
That said, there is still plenty to enjoy and be inspired by. Bodonath, Pashinunpronoucable, Bahktpur etc. I would also, from my first visit, recomend the intimate but enjoyable national museum - although I never made it back last November.