HEY.
My favorite banner would have to be Carrie because the colors are so fabulous cough vivid. Your graphics' colors are amazing in general, such as in look and fallcolors. However, you have some blunders, such as your first icon, which is a bit too dark/dull for me, but hey, it is your first. Stick with the vivid colors. I wouldn't want my little morning bliss going gray.
I adore your current theme, as the pinks/greens are lovely. Great stock and cute flower/spider. :3!
Even without color, your work is stellar, sweetie. Puppy tag is awesome. C:
As for pieces I do not like... Probably most under the "More Improved Tags" second spoiler. Some pieces do not work; for example, Peach Power features a 3D render but you place it on a flat background with pink vector like or geometrical shapes. Not cool; I am expecting some blasting C4Ds and sparks and blurs and anything to indicate the adrenaline when Peach is racing on her bike varoooom.
In Gangsta Graffiti and Spotlight On Me, too much is going on, imo. In particular, the later has this glowing red wall and then purple/green smudge balls too? These colors only go together... On Easter. D8? Focus on the render (do not swamp Selena in colorful rainbows..) and complement the render with a similar or even a complementary pallet to make a statement.
I agree with Break on that you are improving fast. The last tag I saw was your Haruhi one, which was splattered with colors (tbh, I never liked this tag too 8D), and now, you have progressed into really utilizing your colors effectively. :'D
Next time, link to images used for better critiquing aaa.