I say everyone's hand except Vegeta's don't look right.
Android 16's left hand looks 25% bigger than his right when they're not that far from each other distance-wise.
Android 18's hands are in the same position as 16 but her right hand (in the same position as 16's left) isn't 25% bigger than her left hand. And they're both way too tiny in general.
Cell's hands look like pinsirs. They're minuscule. His feet are as well and don't look right.
Mr. Satan's hands look bad as well. Look like skin coloured pieces of popcorn. The look proportioned to his body though as his head isn't as big as 18 and Cell's head isn't that much smaller than his while his hands are like 75% smaller than Satan's.
Trunks head is the same size as Mr. Satan's... but his hands are even smaller? How does that work?
Son Gohan's hands look alright, due to he's in his teenage years so his hands should be a bit small. His hands are bigger than Trunks and Cell though... how does that make sense?
Piccolo's right hand looks like the right side while the distance his left hand is to his body should not make it 2.5x bigger than his right hand. Come on...
Son Gokou hands are bigger than Cells, but smaller than Gohans? What? What?!

@gaia no it's "gokou"

Goku, your arms don't look quite right...