I did the 12-day Annapurna Circuit short trek, expecting it to be a group tour. However, since I chose late November (the end of the busy season), it turned out to be a private tour, which was still an amazing experience. My guide, Asha, and porter, Basu, were incredible, and they introduced me to temples and sites along the trek that I wouldn't have discovered on my own.
A thoughtful touch was being provided with clementines and pomegranates every evening. The hotels in Kathmandu and Pokhara were very comfortable, and if you have time, I recommend adding an extra day in Pokhara, which I found much more walkable than Kathmandu.