Hey Jim, Some folks do specialize in one or two types of scrolling. Take Al- Intarsia92. He specializes in intarsia, but I have seen him do other types. I tend to do a lot of fretwork but I certinly don't speciaize in it. I basicly cut what ever I like. If I see a pattern I like, I cut it, from Intarsia to puzzles and baskets and whatever. I have not tried bowls because it is easier to do them on a lathe.
I do other forms of woodworking too. I have a lathe and a full woodshop, so whatever apeals to me, I can make it.