I do not like da too much for one reason: it's filled by alot of hormone filled kids(you see 15 yr girls' stock images that really have crappy quality pictures up as the daily favorite and they have never actually helped out the art scene) which is sad. Alot of good artists go un-noticed. Alot of good artists here go unnoticed on DA due to that.
Interesting deviations but like many others said, some of the stuff is bland and un-interesting. I would like to see a bit more of your 3d work. Try and branch out. Find a style you really want to learn and go at it. It's the best way to do stuff
Once you get really good, try and branch off to different sites. Create your own. There are endless things you can do.
Good luck and nice gallery, I enjoyed some of the deviations you have.
http://www.deviantart.com/deviation/5998486/
Thats my fav