This year's SR was, I think, my first car free one. Rode to the start of the Upper Thames 200, the 300 was a permanent starting in Alresford and I rode to the start of that, the 400 (Auld Alliance) started at Haymarket Station so took the train for that, and the 600 (Border Raid) was near enough to Newcastle that I took the train up and back and rode to accommodation and onto the ride. But that's partly because of my peeve about PBP years when you can't do PBP.
CET Juniors' exams and exam results took May, June, and second half of August out of the calendar. Which left hardly any rides available in the calendar to complete an SR series (train travel from London to Newcastle/Edinburgh is not cheap even when booking 12 weeks in advance).
Otherwise don't really have any Audax peeves. If the start time, location, route isn't to my fancy, there's usually another ride in the calendar which will suit. Roads with grass growing down the middle add character, and most riders' conversation is better than silence. That's probably why I keep coming back year after year and riding events rather than entering Sportives or Time Trials or just heading out on my own...