Didn't answer because none of the responses seem right to me.
I didn't "adopt the Vols"...I was born into Vol Nation. I've never been anything other than a Vol fan. Even though I went to school somewhere else. My school (West Point) even played the Vols while I was there; I rooted for Tennessee. Yep. And, heh, we won.
For many Tennesseans it has nothing to do with where you went to school. It's as tribal as Tullahoma versus Manchester or the Hatfields and McCoys.
Tennesseans should be Tennessee fans. Period.
Go Vols!