>>7900668I'm not a great poser myself, but I've spent some time working on it. Your poses there look "loose" in the sense that they aren't really putting their all into the attack. DB characters usually have tight poses, pic related. Remember that Vegeta brings his right leg up to his chest and his chest and arms are angled upward and his head his facing down in front of him while doing the Galick Gun. It's tricky to pull off with a fig, but it's possible with the right angles. Goku usually brings his right leg up and extends his leg out in front of him while doing the Kamehameha. His hands are also down by his waist. Make sure to look up references as well. I recommend looking up moves from DBFZ and trying to recreate those. There's also guides here on /toy/ on how to properly set up the body so it looks correct and anatomical, if you really want to get into it.
