Oh big time.
One of the first things I ever debated was "which side would I be on"? At first it leaned Confederate, but then I found I also have a Unionist ancestor. Then, "Well I guess it would depend on where I lived". So I had to dictate that on where the family was back then. Dad's side was already in New Mexico Territory (Southern New Mexico! Future Arizona, near the future site of Fort Thomas). Or mom's side: West Tennessee or East Texas? Guess the question still stands. Probably Confederate, and me right smack in the middle of either Granbury's Brigade or Tom Green's Cavalry.
My opinion of both Sherman and Forrest have drastically changed since I was a teenager. I openly disliked Sherman, but after reading some of his memoirs and his characterization in Jeff Brooks' novels really made me sympathetic to him and his PTSD.
My opinion of Forrest was shaped by and large by the misconceptions that he was the founder of the Klan, not merely it's first and questionable Grand Wizard status. In time I read both Jack Hurst's and Brian Steel Wills' biographies of Forrest that greatly changed my opinion of him.
I also found myself having a strange support for Jefferson Davis, in the sense that he really, REALLY didn't want to have the job of POTCS. And yet when picked, did his absolute best, even if it led to failure.
As for Lee, I never did see him as the "Marble Man" stereotype. But I still see him as a very George Washington-esque figure, and not just because he is literally blood to me.