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This Zinnia tag] is intense, but that wasn't achieved in the best way. It seems as if you burned the tag too much, and you made certain parts of it very oversaturated as a result. Her face is most notably saturated. Whenever this happens, layer masks are your best friend. HMU if you need an explanation for those ;-]
(I don't want to spell everything out for you, because I personally think that's way too condescending in the case that you do know what these features are already.)
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CORNER TEXT] should not be done. I suppose there are a few cases where it could be acceptable, but this is... far out. Really far out. It should have been placed close to the main focus, which is the dude in the middle, but instead it's distracting. The font choice is also pretty bad. Fixed width fonts are awesome, but definitely not a good fit for this piece. A bolder, heavy-weight font would have fit the choice of render better. Layer styles would make it even more appealing as well. A Gradient Overlay, or possibly a clipping mask, would give it an extra pop. Again, feel free to hmu if you need further explanation for anything.
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The styling of the text is great], but unfortunately I can't say the same for the placement. You have to get both, or it doesn't count (sadly). This is why it's often said that text can make or break a tag. I would have put it close to the model's head, in the space to the left. It's pretty small, but with text warping and different colors, you would've been able to pull it off.
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It appears like It appears as if you suffered from a classic case of "idk what effects I'm going to do" when making this tag]. I know because this gets me all the time, actually. Effects are what makes a graphic interesting, so it's important to be able to tell which type of effect would look best with an image. For that one, I would've gone with light effects. Splatter should normally be reserved for anything that falls in the "fun", chaotic, or gory categories... Or when you want to add a clipping mask. That isn't the case here though, haha.
You know what, I might as well give a quick run-down of the most popular effects (barring light and splatter, as I've already mentioned those)
C4D- Can work with anything. Use this if you get lazy, or as a last result. Regardless, C4Ds rarely let you down.
Vector Shapes- Goes along with fun tags, stuff that's bright, or anything that is pretty vibrant in general
Texture-based- Tags done in this stype are the opposite of C4D-heavy works. They look flat and often lack depth, but they're often the most interesting. An example of someone who does signatures in this style is Megatastic ;-]
Smudge- Yeah, it's a beast. You'll have to take it head-on sooner or later though, because smudge is like C4D in that it can work with almost anything. A plus is that it's easy to create flow with it as well, and make interesting backgrounds
This seems like a pretty tiny list, but it's more than enough for most people. There's a ton of resources to be used, and many ways to make each graphic look different, even within the same style/category.
Let me know if you need any specific information, or if you want to see examples of each. I'll be happy to accomodate ;-]