I hope this is in the right section! I was playing with a metal group, and the guitarist got upset after a rehearsal because I did a fill at the end of a phrase. Since then, I've been pondering over this sort of schism of playing styles. I like to play busier lines under a solo guitar because, as far as I can tell, a lot of sonic space opens up when a guitarist goes from chordal riffing, to above the 12th fret shredding. Now, I've noticed that many folk think you should simply 'hold down the fort' when someone is soloing. Am I wrong in wanting to do a little fill every now and again when these opportunity presents itself?