Your uploads have been OK, for the most part, but I have a couple of comments.
First, don't upload images with titles that don't describe their contents. When users search for an image, they're much more likely to find it if the title is properly written. Otherwise, they'll have to search gallery after gallery (each of which often contains over one hundred images, most of which don't have captions). Don't abbreviate information either. If the image came from "Ben 10 vs. The Negative 10", put the full name of the episode in the image's title.
Second, you've uploaded images that came from other wikis. That's OK. However, you seem to have uploaded the thumbnails (put simply, the images as they appear in the articles and/or galleries), rather than the image as it is. To upload the image as it is, you need to click on the image with the left mouse button, and then save the image as it appears on the pop-up.