Oh my, you're quite talented, aren't you? A lot of these are really, really good. I have to say, viewing your work chronologically, you've improved a lot over time. I have to say though, I think I like
this one the best. I know you didn't list is as your all time best, but the colors are really working for me.
However, I am picking up on something in your tags. I'm feeling a lack of flow in them. The focal of each piece doesn't have effects or brushes that compliment and move with them, and in some cases (the Gardevior one, mainly) it really hurts the tag. Another thing is your use of text. I'm not sensing any fluidity with it, and they don't seem to blend very well with anything. Luckily, these are all things that you can work on and improve. :)
Overall, I like what you're showcasing here, and I think you're right on the brink of doing real, solid professional level work. Just remember to take your time and really study your subject. Identify things like it's positioning relative to the audience, which way their facing, the positioning relative to the tag, etc. And, of course the old rule, less is more. Keep up the work, okay? I promise it'll pay off. :)
You had a broken link in there so I went in and fixed it for you. Hope you don't mind. o/