I'm pretty sure it started with the piano/cello duet I played with David Hastie in high school. Arioso is beautiful as a piano/cello duet and it was probably my favorite piece to perform.
Currently I love the theme song to Angel. Soulful is about the only word I can think of to describe it. It's beautiful. I think it's the cello.
My favorite album at the moment is Abigail Washburn and the Sparrow Quartet. Amazing. Complex. And... yes, a bit of cello. Click the link to hear some of the album. It's a little bluegrass, a little oriental, and a lot of funky beautiful. She yodels in her own style, sings in Mandarin, plays banjo and shares the stage with another banjo, fiddle, and cello. Makes for a unique sound I've never heard anywhere else and I love it. I think it's the cello.
And so, if I could do it all over again, I'd skip the flute. I'd choose the cello. And I'd play the most beautiful music I've ever dreamed up.