I was a HOG member about 10 years ago.  I got out of it only because I ended up selling my bike.  Now that I'm back on a HD I will likely join up again.  As with any group, it is what you make of it.  I found it to be a good excuse to go ride, and also a good way to make new friends to ride with.
I am also an ABATE member, and I like their philosophy that it isn't what you ride, but rather that you do ride.  I've ridden many other bikes and my personal preference is a Harley.  I LOVE THESE BIKES.  However, I won't knock somebody else for what they ride.  I don't think most of the folks I met back then in the local HOG chapter would either.  Definitely some good folks there, and worth checking out your local chapter.  One word of caution: if there is more than one chapter in your area look for the chapter that is more active and seems to be organized well.