The blocks look big enough so that crossing the seams shouldn't be all that bad.
I love the Baptist Fan pattern, but traditionally it was used as an all-over pattern for a quilt. I could be wrong, but I'm thinking it might look strange confined to a block. Were you thinking of layering the fans as in the traditional way of doing it? Or were you just going to do one fan per block? And how far apart were you planning the quilting lines? All of those things will affect how it looks.