I like #3 because of the concept, but it also makes me want something more like a burrowing anglerfish. Basically I’d just prefer it to pop out and fight instead of just open the ground/facehole and bite you. Either way its a good way to incorporate a droppable ingredient
#8 I picture hiding like a flower up in tree leaves and attacking anyone who tries to chop that tree down, and then flying down at your head like a facehugger… which would be awesome.
I know this is supposed to be more for look than behaviour, I just have a hard time judging one without picturing the other.
My personal favorites are 2, 12 and 13, however I think that a territorial creature should be able to chase you, in which case I’d choose 1, 4, 7 (with 7 perhaps opening up like 13) or 12 (especially 1 and 12).