I use a lot of mulberry. It is mild, similar to other fruit woods. Works good for poultry, meatloaf, ribs, etc. I recently used 3 chunks on a wild turkey. It was good but light in flavor so I could have added another chunk. I generally add a little walnut or hickory when smoking red meat. I am planning to try it next time I do smoked cheese since I thought hickory was a little overpowering on the first batch I tried.
Mark