You can always approach this from the legal aspect. If you get sued, where would venue and jurisdiction be proper? This is a matter of domicile and the nature of the claim.
As for your domicile, you are domiciled wherever you live, as long as it is where you intend to remain and make your permanent residence. The types of lawsuits in which this becomes an issue are people moving from one state to another and college students.
Example: If you live in NYC and work for a company. You plan on residing there until whenever. NO PLANS TO MOVE. Your comapny says "Oh, we're relocating to Miami. Decide in 4 weeks if you're going to move with us or not." You decide you're moving so you pack up your things in a Uhaul and set out for Florida. You get hit by a punk law student in Chapel Hill, NC (never been a fan of UNC since Roy Williams left KU). You are still domiciled in NY because, even though you have no plans to go back to NY because you're company moved to Miami, you are not in Florida yet. There must be intent to make the new place your home and physical presence in that new state. Once you cross the line into Florida, you're domiciled there.
As for some that are from Tenessee but live in NYC, if you've been there for 4 years, ask yourself this "When I leased my apartment/flat/condo, did I plan on staying here with NYC as my home, or did I plan on this being a short-term stint and someday moving back to Tenessee?" Evidence in favor of you being domiciled in NY would be paying taxes to NY state, but that's not necessarily going to throw the decision one way or the other. This would only be evidence regarding your intent to be domiciled somewhere.
My opinion: You're from NY. You might have grown up in Tennessee, but now you're from NY. Besides, will it be easier for your to get accepted if you're from Tennessee? If so, I'm moving next weekend!