I'm a racer at heart, so in a lot of cases, it's the quality of the courses and the racing that tends to define my enjoyment of an event, rather than all the other gubbins that goes along with it.
I started the season by looking at the races I wanted to do. I spent ages poring over calendars and ultimately struggled to find many things that really motivated me.
Did the Gorrick 100, which I thought was well done given the conditions in the run up. One that hasn't been mentioned so far is the XCM Champs (in parallel with the CRC Marathon) in Selkirk. OK, so it was only 71k, rather than the proclaimed 85k, and some bits had suffered from the previous week's rain, but on the whole it was a great single loop course. Really impressed and hope they can run something similar again next year.
Mayhem was a massive disappointment. The weather played its part, but the whole event felt lazy. The course was exactly the same as last year (which was hardly inspiring) and to have only laid on 3 bike washes and ~15 showers for nearly 3000 racers was poor. As others have pointed out, at ~£60 a head and massive sponsorship, it's difficult to see where the money goes. The event was saved by having a decent team setup and a few beers with mates, but I'm tempted to do something else next year.
Kielder 100 is on the cards again (hoping that the Summer rain translates in to a dry Autumn!), but ultimately, my head's been turned by foreign adventures. Proper epic courses, big mountains and decent value too boot. It means fewer events/races, but the quantity is more than countered by the quality. Unfortunately, I'm not sure there's much in the UK that can, or will be able to, compete.