Here's a Genesis-Styled Modern Sonic.
Tell me what you think of it.
I think the eyes could be improved a bit, but it looks nice so far.
The middle one looks the best in my opinion. One thing I might suggest is adding a mouth, but that's up to you though. It looks good so far!
These sprites are pretty good. The only thing that's really off about it is the eyes, like QuadFactor said. I feel that they're too... long? I guess that's a way to put it. Other than that, good job!
One year later, I bring you an Upgrade!
Both the old and new are looking really cool!