Great posts so far.
Biggest change for someone going from a boarding barn to a home care situation is loss of the social aspect. This can either be a good or a bad thing. If it was a gossipy, nasty, backstabbing barn, being free of that environment can be a blessing. If it was a more positive environment, it's a real loss. People to ride with, people to ask "How does this look?", people to set fences for you, people to chat with through the dull stuff. The time I most miss barn buddies is tack cleaning. My tack was a lot better cared for when I was in a boarding barn.
Other losses moving from a busy barn to home care: your horses are less socialized. This sounds silly, but there's nothing like the ring at a busy boarding and lesson barn to prepare a horse for showing. Work them in that blissful solitude and isolation for a while; and going into a schooling area at a show becomes a BIG step.
For me, personally, since I no longer compete, home care is definitely preferable. I LOVE having my horses at home, and having everything done exactly the way I want, within my means. However, if I were still competing? If I could find a good barn at a reasonable price, it would be a blessing. No trying to put rugs on after dark, no 6AM knocks on the door with the message "Your horses are out.", no arranging care anytime we want to leave town, no riding alone wondering if what I feel is what I would see from the ground....