My in laws live in a townhouse with an HOA run by the stereotypical HOA busybodies. They pay $125 a month, and that basically gets them access to a nice pool. They are responsible for all exterior maintenance- in fact, on a quarterly basis, a feature in the HOA newsletter is a list of all the units that the HOA determined will need to re paint/re stain in the near future or face fines. One time they left mistakenly left their garbage can out overnight after collection day- sure enough, a few weeks later, they got a letter in the mail reminding them of the policy re: garbage cans.
One of the selling points of their neighborhood was that it is directly across the street from a commuter rail station. Shortly after they moved in, the HOA floated an idea to pay an off duty police officer to come a few days a week and hand out tickets to any resident crossing over the HOA's split rail perimeter fence to get to the train station. Their claim was that by crossing over the fence, residents were "trespassing" across 20 feet or so of HOA owned land outside the perimeter fence to get to the street. That went over real well- apparently at the next HOA election, EVERY board member was replaced.
OTOH, as others have pointed out, they do have their place. My wife and I looked at a house for sale in a newer neighborhood with no HOA recently, and there seemed to be a neighborhood wide contest to park the crappiest looking old camping trailer or RV in front of your house. The house we were looking at was 1 of 3 on a cul de sac. Of the other two, one had a boat on a trailer half in the front yard blocking half of the sidewalk, and the other had a two car driveway occupied by a utility trailer and a car on blocks.