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I love the concept of the tagwall. I like that you made a sig for every character. The sigs are not that amazing but you're still learning so good job so far, keep it up my friend
I really like the Iron Man one, personally.
The biggest elements missing in your sigs are proper lighting and flow. Try to bring more attention to a focal. Not bad on some, but they're not really my kind of sigs either.
tip: don't use a background that attracts attention when you're trying to get people to focus on your tags
thanks for all the input guys. yea i guess it would have been a good idea to blur the background around the sigs. lol