The first time I visited Machu Picchu, it was so beautiful I swore I'd return. The second time I visited, I was especially glad I did, spending a week in the Sacred Valley which was in a word, magical.
On both occasions, I took the 4-hour long train to Aguas Calientes, followed by a rumbly bus ride up through the brutal switchbacks that lead to the amazing ruins.
The government of Peru announced plans for a new airport, closer to Machu Picchu, noting that its remoteness, and the long train ride are so inconvenient that only 3000 people visit a day.
The journey is the destination. Hear, hear!
(I'd go back in a heartbeat)