Hey dude. Your paintings are great. I like that you have started to tighten some of them up. Keep doing that.
Your pencils, in comparison, are a lot weaker. I use the word 'weaker' simply because your paints are so good. I think you should concentrate some time on drawing more. Do some life studies. And work on your mech design a bit. Maybe do a load of thumbnails to get interesting shapes before going in and painting something.
Keep it up : ]