I've done one century; something has stopped me from doing one again. In fact, each year, I seem to do less and less longer 50+ mile rides, but yet, I have done more total miles for each year since.
Part of my problem is my refusal to "train" for such events. Most of my riding is pretty hilly and I use that as my training; anything else I know I can suffer through. I also don't want riding to become a chore.
I am thinking, though, that I will do a century again, this year. It's been 6 years.
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport