IoWCG, in response to your simple (and complex) question, I must say, “Both . . . and neither.”
Sorry to answer in such a Zen way, but that is the reality of it for me. I am both, in that I honor my heritage in remembering my direct ancestors: three served with the Confederates in Louisiana, and one with a Pennsylvania regiment (and was actually at your Siege of Suffolk!) . . . and yet, while I’m like many, I suppose, who read accounts of the war and suspend disbelief, hoping that the Confederates will somehow pull off a victory against all odds (but knowing how it will end), I am neither a Rebel (using this word in the very narrow sense it is used in this discussion) or a Yankee. For the “I” that wonders, “What would I have done in the battle of X?,” or “What side would I have fought for . . . if either?,” was not there AND could never have actually existed then. I may imagine what “I” would have done, but I think when I (and others like me) do this, what I am really asking myself are questions like, “Am I brave?, courageous?, compassionate? Do I think some things are worth fighting for? Dying for? Killing for? What do I believe in, if anything? Do I challenge any beliefs with my experience and common sense so as to avoid blind allegiance or delusion? So I think when we look back on history, we do so ultimately to learn more about ourselves now--in the now. Seems to me that neither the Confederates nor the Unionists had an exclusive claim to the moral high ground (or low ground!)—and it’s very difficult to say what the war was fought “for,” as many people fought (and didn’t) for many different reasons. Maybe my being born in raised in Texas (which brings up the whole area of the influence of geography on one’s perspective) and now living in my adopted state of California helps shape my perspective—of course it must, in some way. Hmm . . . this may be telling, but here’s a thought experiment one may try in order to gain some insight on your question: If one were forced to join either a Federal or Confederate re-enactor troop (O.K., or costume party!), which would I represent (leaving out the very real pacifist option, if just for this experiment)? If I do this, I answer, with difficulty, Confederate (as I imagine my Union ancestor’s upset!). Is this because I am a "Rebel" at heart (oops, violated my own strict definition of Rebel)? Is my choice informed by my 3:1 CW ancestor ratio?—Could it really be that simple? . . . or that complex?