It was a good holiday, but it made me look for something smaller next time, hence Cricketer Holidays. I have exactly the same problem as you. It's very difficult for grown-up, intelligent, adventurous travellers who are forced, for whatever reason, to travel alone. If you're young and into heavy drinking there's all the 18-30 stuff, but most tour operators seem to assume that everyone else has a partner who wants to travel with them. I've tried many of the usual answers to questions such as this.
Solos are of a high standard, but very expensive.
On one 700 trip the same week in the same hotel would have cost 400 with another operator. Ramblers Holidays are good value, but even the city breaks attract the serious walkers in anoraks and hiking boots. The trips seem to be very much done on a shoestring, so don't expect interesting local specialities at meal times. However, they do attract a lot of much younger travellers such as students on gap years funded by rich daddies. It can lead to friction on self-help camping trips when it comes to the allocation of chores.