They also claim to "represent" a membership that has no meaningful input into the policies they represent.
I always thought that the things AOPA fights for were things that myself and other pilots I know felt equally strong about.
Perfect example:
User Fees - this seems to come up in each year's FAA budget talks and AOPA has been there since day 1 fighting against it. I think without a collective voice like AOPA, we all might have already started getting bills in the mail every time we clicked the mic to talk to ATC. That's not to say we won't see them at some time in the future, but the fight has been going on for at least 10 years.
I always liked Phil Boyer, who reigned a few years ago as AOPA President after serving the position for nearly 20 years. I was able to talk to him at one of the AOPA Open Houses in Frederick one year, and again at Sun n Fun. A very approachable, down to earth fellow pilot.
He was a huge proponent, on the membership's behalf of, among several things, the General Aviation Revitalization Act. Without that, we may not have seen a re-growth in the GA manufacturing industry of New Piper, Cessna, etc. He, with AOPA's support, also pressed hard for the quick adoption of GPS, WAAS and ADS-B.
It never seemed like AOPA was acting in a vacuum, absent any input from the membership, in all those efforts.