The images for the first three are awfully small.
Two more little criticisms, though they will refer more to your organization.
First, your topic name is partially misleading. I would like to point out that most other topics on the forum have more than one word for their names. My suggestion is to change the name to "Zacmariozero's Skins Thread" or "Zac's Skins" to differentiate your topic from others. Just "Skin" doesn't really define what you're doing unless the user wants to look at the topic author...it looks slightly more professional to have a topic name of more than one word.
Second, if you're posting them all on deviant art, why not label the images before the spoilers, and post a link to them right next to it? Doing so would probably reduce confusion a bit.
I have two other suggestions related to my last list:
Please make sure to double the resolution of the images before uploading them. Remember how I mentioned mspaint? From the looks of things, that's what you've been using to make your thingies...which is fairly common. But make sure to save an alternate version of your skin, one that you've doubled the resolution for and one that you can actually make into a skin. But for god's sake, when you do this, do not using the selection tool's stretch thing in the corner I see this in your Ruby Spears Megaman skin still and it makes me cringe.
I am very glad you melded all of your skins into one topic, but please remember to give credit where appropriate. I still haven't seen this on your ROB skin.
One last thing: If you're going to make an edit of a skin already in the game, please make sure to use the newest version of that skin. Once again, I cite the out of date Ruby Spears Megaman...and I even gave you the thing for it.
I would very much like this topic to not die now just because I posted a wall of criticisms, please note that I am not trying to directly insult you and none of what was posted here was meant to express any form hatred or contempt. My ultimate goal here is to try to keep you from gaining such amounts of hated you said you were receiving.
I stated in this topic (http://cutstuff.net/forum/viewtopic.php?f=30&t=6356#p276789) that using the stretch option in the corner of the selection tool distorts the sprites and makes them impossible to make into a good skin.
As for the ROB skin credit, Mike stated in your original ROB topic (http://cutstuff.net/forum/viewtopic.php?f=27&t=6303&p=276882#p274836) where the source images was from. The source image contains the name of the contributors and even says "credit is cool," which I found pretty hilarious. Anyway, as the bottom right cornet of the picture states, the artist appears to be Tapika...unless I'm reading this wrong.