My Fantasy RPG World, Feedback and Ideas appreciated

I have much art in the pipeline.

Diana Rathfoth is working on a grootslang illustration right now.

Harper James is working on elemental themed trolls.

Zeta Gardner is working on some gnomes when it gets done with his vacation.

I just need to get over some indecision with the trolls and gnomes. I'm going for an air troll with flying squirrel-like arms, a firebreathing fire troll, a thick skinned earth troll and an amphibious water troll but I need to make up my mind on facial features.

All I got so far is big, ugly, pointy teeth, clawed hands.

Tusks, yes or no? Big ears or little ears? What shape of ears? What style of noses? How hairy should they be? How scaly should they be?

The grootslang, I have a pretty good idea what I want, and I already got some preliminary sketches. Scaly snake body patterned off of zebra cobra. Elephant head with tusk/fang hybrids.

I am probably going with the general snake pose in sketch 8 and the people position in sketch 7