There were many such moments. In no particular order of preference -
The flights to & from Lukla - spectacular, thrilling and frightening all at the same time
Watching the sun set on Nuptse - stunning
The walk from Dingboche to Lobuche and onwards to Gorak Shep the next day. New, superb views open up around nearly every corner
Walking amid the desolation of the Khumbu glacier, reaching Everest Base Camp and fulfilling a long-held ambition
Looking at Everest from the top of Kala Pattar on the clearest of days - simply breathtaking
Watching the monks from Thyanboche monastery performing an open air ceremony, followed by sunset on Lhotse & Everest, now so far away
If you can do a week's walking in the Lake District, or the Scottish or Welsh hills, you can do this trip. The walking is not technically difficult, but it is made harder by the altitude.
This was our 4th time over 4000 metres & second time over 5000 metres, but this trip does spend longer at higher altitudes - approximately 5 days above 4000 metres, of which approximately 2 days are above 5000 metres. It would have been 7 days above 4000 metres if we had not missed out on the 2 acclimatisation days due to delays getting to Lukla! So far, my wife and I have managed to avoid serious altitude problems. Maybe we have been lucky, but we try to help ourselves as much as possible by -
1. Drinking at least 5 litres a day - water, tea, soup etc, but avoiding alcohol!
2. Eating as well as we can, even if we don't always feel like it
3. Taking part in all the acclimatisation walks on offer
4. Walking slowly & within our capabilities at all times
5. Accepting the headaches, breathlessness and other discomforts, retaining our sense of humour & interest in our surroundings and adopting a strong, positive, mental attitude
Never postpone climbing your favourite mountain - or even visiting its base camp!