Charcoal Vs Graphite Drawings

I have been experimenting with a combination charcoal/graphite drawing over the last two days and while it looks ok I the next one I draw will be using Graphite only. This is because I have veiwed other artists work in both mediums and I think I prefer the effects that can be acheived with only graphite. I should be able to post the combie drawing in the next two days.