I'm no good with articulating praise and/or critique, so I'll just
comment on the ones that struck me.

Bowser:
I think I like your's the best. It reminds me of the old Life computer
simulation.

Mardon:
I love the texture and not-quite symmetry

Alan Browne:
I don't think I've seen a fern that colour or at least stay that colour
for long. It's almost like tarnished gold leaf, if there is such a
thing.

Jim Kramer:
Your's is the only one I can't see what is going on, maybe I'm missing
something.

Take care,
James