Hi Ian
" I felt the burr would have been overshadowed by any thing but what would you have sugested ?"
I would have liked to see the bottom with a little bit of detail turned into it, at the moment it just looks like you have left the chucking spigot in place.I think I would have cut it down in height a little bit and cut into it and left about a 2-3 mm rim and tried to continue the curve of the bowl somewhat in the middle. I think it is just a case of saying "look, I have paid attention to the bottom aswell".
But don't forget that is only what I would do, as the maker you should be putting your own "stamp" on it.
I still like it and think you have made a very nice bowl .
Regards
John BHT