Wow, the one with the young warrior is great. I love all the detail you put into his clothes and making him look "roughed up".
As for the one with the 2 lovers, I thik it is very good. I like the emotion on their faces. It expresses their emotions very well.
And the last one you posted is awesome as well. The clothes detail again is extremely well done and I also like the wind effect in the hair.
This is just my unprofessional critique.
I have a question for you, can you give me any kind of advice on doing hands, clothes and proportiong the bodies to the heads? I would post some of my art up but at the moment I have no means of getting it in my computer. Anyway, GREAT JOB!