I like the colourful "special effects". Very flashy.
love your first 3 renders, very action packed and kick ass, reminds me of some of the old school kung fu poster, very Enter the Dragon.
I really like the one of the girl in the wedding dress very unusual concept with the dragon, but you really pulled it off well. The only suggestions I would make is having the dragons tail come around in front of the dress and just getting a little bit of depth of field to blur out the background a bit, to really let the bride stand out from the background and make her pop. You should be very proud of your efforts, great work. Thank you for sharing it.