Berberis seems to be a common thread on the forum, so I thought I would add mine. Here is a tree that I have worked on for several years. It is the variety 'Bagatelle' which has very nice reddish purple foliage turning crimson in fall. I didn't like the look so last year I cut most of the branching off and regrew new ones for the new front I had planned. I rotated the tree 90 degrees to better see the movement of the gnarly trunk. Everything is in place, now I will work on the ramification. There is a couple of buds in place for the space near the top on the right. This bonsai was a large shrub that I cut back in stages, I finally like where it is at.