Loki, these are wonderful! I'm really in love with your expressions, though your lineart is pretty amazing too. Overall, I really like everything but this one is my absolute favorite~! The pose looks beautiful and you colored the suit wonderfully, ahh.
Definitely going to go stalk your deviantART account now n_n
Your recent update was pretty great too; that softer shading really does enhance the look of the character. I especially adore the coloring of the eyes, though! Great job!!