I've seen some really nice larch turnings where the growth rings have been exentuated to add texture by wire-brushing or sand blasting the softer early growth away. Simple shapes seem to work best.
Holly is a real pig to season - it moves like anything and goes grey unless dried quickly. From my experience for best results turn it while very fresh very thin or cut it into small cross-section spindle blanks (say 2"x2"), end-seal and dry inside by direct heat.
Oak can also be tricky to dry in large sections too but if you rough turn bowls from it (beware leaving wet shavings and dust on your tools because they'll rust very quickly) it seems ok or alternatively cleave it into smaller sections and end-seal and air dry in a cool dry place. Once dried, in comparison to kiln dried oak you sometimes get you'll be amazed how nicely your air dried stuff turns!
Hope this helps. Good luck.
Jon