I'm pretty sure you posted some of these to Gutterzombie a few months ago*. Like the guys over there said: the standard of the painting is very impressive, but as soon as you move away from photo reference, particularly noticeable on the faces of the Thor, Wolverine and Daredevil pieces, the limitations of your skill at this stage start to become apparent quite quickly.
If you're looking for front cover, album cover, novel cover, poster work, then you've got a strong portfolio. Comic work needs storytelling, and there's none of that here, so it's impossible to comment.
Cheers
Jim
*If that wasn't you, then you need to be aware that photos you're using for reference seem to be quite commonly used ...