fewer scribes will say that they are equally good at both - and love them equally.
Really? I love them equally. I could never choose a favorite. I will say though I think my copperplate is better than my spencerian but only because I am out of practice and was never good at studying the letter forms. Now that I am, I can see all the areas I need to improve. My problem is I prefer to blend them. 
i shouldn't have attached *love* to the discussion.
i, too, *love* all the styles - i *love* pointed nibs and broad edge equally - i *love* the act of making letters - i love pencils, markers and gel pens as much as i love nibs and ink
many (clearly, not ALL) of us who have tried everything, do not become equally proficient at everything- so i attached *love* to the idea that some of us (some, not all) have a style (or a few styles) that we use to showcase our best work. i *love* that i have a couple styles that i feel are my best - maybe that expresses it better.
Erica: i don't see it as a problem that you blend the styles. 20 years ago, there were no classes at IAMPETH that covered variations and blending. it is refreshing that blending is now pretty mainstream. you know the steps to take if you want a very traditional look. as you say, it's more about staying in practice. reminds me of what ballerina's say. if you miss one practice day, you can tell it in yourself. if you miss two practice days in a row, your partner can tell. if you miss three practice days in a row, the audience can tell.