It's looks pretty good in the body, except maybe a bit too dark, try to brighten the highlights more.
As far as the side view I think it's the helmet, it looks as if your looking at it straight on from the side instead of from above as is your perspective.
This seems like the "Pokemon" Gameboy character persepectives, so it's a bit tricky, but you need a slight angle adjustment on the helmet I think:
I found this that kinda highlights the issue but it's only from the front view: