It was the first time I can remember being asked if I was married. "No." I replied, "I'm living at home." I wanted to slap myself as I said it, because I despise the term, and the derogatory usage it usually receives. It's one of those American idioms (probably the British are too classy to use it) that really makes no sense. Doesn't everyone "live" at their "home"? Assuming they have a home, that is (my sympathies for those that don't). My dad owns this house, and it's definitely his home, but if he were to use the phrase "living at home," even though he's married with nearly grown children, one would understand that to mean he was living with his mother. Why is that?
Oftentimes the term is used with "still" inserted: "I'm still living at home." That makes it a little more logical, because it implies that you are still living at the only home you've ever known (whether it be different buildings or not, "home" for the first stage of your life is usually with your parents), but also increases the negative sense, because it seems to imply that you shouldn't be "still" living with your parents, or that you wish you were on your own.
I'm contentedly living at home, and it's not because I'm stuck here. Why should I move out? First of all, I don't have that "can't-stand-my-parents, must-escape-at-all-costs" syndrome that is socially expected in anyone over 16. My parents treat me like the adult that I am - I have all the freedom I could wish. I appreciate their advice, and enjoy the close relationships I have with them and my siblings, who really are my best friends. Sure, I have occasional days when I feel like my own space might fix all my problems, but I know that's really not true, and those days don't come too often. I am very happy living with my family, and expect I will stay with my parents forever, unless I get married.
"Great," you may be thinking, "another example of a adult refusing to act like a grown up and be independent." Grown adults who continue to "live at home" often seem to be regarded as lazy bums with no job who don't move out only because they are unable to afford it, preferring instead to mooch off their parents. In my case, the room that I share with my sister has plenty of room for me, and my parents would still be paying electricity, etc. even if I didn't live here. Since I do, I save having to pay those costs for myself. In return, I try to be helpful: picking up groceries, kitchen work, cleaning, and pushing all my healthy schemes on everyone. I do have a job, which I use for my own purchases and things like car repairs (nasty things, those) and piano maintenance (yay for tuned pianos!).
I love living here and being a part of my family. I'm grateful that I have parents who are happy to have me stay with them, and aren't eager to get rid of me. I know I'm inconvenient sometimes, and I know I still cost them money, even though I try to be as inexpensive as possible. I'm just glad that they think I'm still worth it. So when I say I'm "still living at home" I don't mean it in the negative sense that it's likely to be taken. It's like saying, "I'm still on vacation" or "I'm still in the happiest place on earth and I get to stay as long as I want!"