In a typical average HOA neighborhood:
* The HOA pays for landscaping of all the common areas like green belts and parks within the tract. If you don't have an HOA, you either are benefiting from your city choosing to locate and maintain those kinds of amenities right by where you live, or you just don't get any of those.
* Obviously one of the big ones, the other main HOA budget item is pools, clubhouses you can rent cheaply for parties, tennis courts, etc. For rich people they don't care since they have their own pools, but it's a great boon to people not rich enough to have a pool to have easy free access to one that isn't crowded and is close to home.
* They, in theory, fine you for outwardly living like an absolute slob or selfish jerk. NOTE: In practice nobody cares about most of these little rules, like mailbox color or a patio chair left on your lawn, unless you're acting wildly outside the norms. The rules are there to let them enforce them selectively on the person who's making everyone miserable.
* They regulate architecture and paint color. This may be my least favorite because it seems like we shouldn't need this, I have taste and why should I have to submit my stuff for approval to these jerks? But really, this is only there because there would be SOMEBODY who would paint their house an absurd garish color or build a giant ugly addition in their front yard or something that looks wildly out of place.
There are also HOAs that place a lot of weird restrictions on what you can do. It really depends on the HOA, some are good, some are very bad.
That said, for the place where I personally am in life, a HOA is bad and I refuse to live in one.
You cannot buy without being a part of the HOA.
At a high level, anyone can sue you to enforce a deed term, as long as the organization/person with an interest is around to do it and knows to do it. As an easy example, a long time ago people added racist stuff to deeds, but those family descendants no longer enforce it. HOAs don’t die like people and collect dues so they don’t run out of legal fees.
You can try to get dead HOAs removed from a deed, and you can try to get a living HOA removed from a deed. Obviously one is a lot easier because it doesn’t fight back. You can also get the residents to vote to dissolve an HOA. Some HOAs expire after so long if the residents don’t renew.
TLDR you can’t buy the house without agreeing to the HOA.
I'd be curious about people's experiences and successes with this. Has anyone successfully pulled that off with a still-existing HOA?
I'd be extremely interested in cases of any modern HOA being successfully removed from a deed and thus rendered moot, ideally administratively without a massive legal battle.