… you don’t want to get sick.
Altitude sickness, breathlessness, mild headaches and impaired judgment are all to be expected and if you have respiratory problems, consult your doctor before signing up.
… a repetitive menu gets you down.
Expect hearty dal bhat
(rice and lentil soup/curry, with veggie variations) with more variety in Lukla and Namche Bazaar. However, as fuel reserves and cooking facilities further up are limited it’s better for groups to order similar menu items, just to help out.
… your exercise routine involves walking to the pub and back.
While you don’t need to be super-fit, the more fitness training and hiking you do before you go the more you’ll enjoy it.