I use friction non-indexed in the front and indexed rapid fire in the back. I used to have rapid fire in front and back, then I transitioned to friction in both. While I appreciated the infinite trimming that I could do when changing gears, I found the ease of shifting with indexed shifting was worth the effort of tuning the rear D. But for the FD I really see no reason to be limited by indexed shifting especially when the sound of chain rubbing is REALLY distracting to me.
BTW, I've stopped to help some cyclist who were having trouble shifting only to blow their minds by quickly tuning their derailleur using the adjustment barrels. It's strange how mystifying such a simple concept can be.