That is tough to say "one" absolute favorite. However, my favorites are my red / green trachyphyllia, red / green blastos, red / green favia, agent orange acans, blue / red acans & LA Lakers monti and red monti. As you can see I like a lot, sorry. Acans and trachyphyllia are my most favorite.
Oh, and my blue haddoni is on the top of the list too.