Jim I love these man. They made me smile and they have tons of character already. I say this with love: They're so good that they are worth keep refining. I think both in texture colour, speccularity, and material indication. I miss some scratches, material variety and contrasts, I think. You have a great base, I just think continue this positive trend with more little tweaks. Push it some more aye.

It probably come down to likes but I'm thinking the purple guys eyes and nose need colour tweaking. I am also a sucker for the matte surface look. You have every right to totally disagree with me

I know you're itching to animate these fellaz and I'm really looking forward to see them come to life.
I love the time period and the design language. Are they from referrence or are you more capturing a style from times gone by here?