There is little else out there to represent the average GA pilot so I chose to support them. I think AOPA does an important job. It is easy to criticise what they do or don't do but I can't see anyone else standing up to be our voice. I, as an individual certainly would not be listened to.
They are also a comforting insurance should I ever need legal representation.
On the me me me subject AOPA save me literally hundreds of pounds a year on hotels and car rental. Ironically most of it is in the USA.
DO.