I'm actually really liking this design. I'd say it's pretty good for a newb like me :3

the arm doesn't really make sense.

I do agree with this. Try and make the wrist, elbow, and shoulder flow with the textures of your bicep, hand, etc. But I think the chest looks nice. Keep working on it! Can't wait to see the outcome.

Okie doke! Thanks guys.

The joints doesn't really match the body textures at all. Just look at them, the design is nice, but if it doesn't fit the hole project, it is bad.

Should I change the body textures or the joints?

Body texture. The joints looks good

on its own, the torso joints look magnificent.
although im biased towards anything tribal.
its simple, good flow and scaling and the colour just pops it all out.

but still confusing.

the body textures are simple cartoony minimalist things, but then the torso develops into a tribal, it simply doesnt match.
theres not much going on in terms of flow from the body textures to the joints, theyr separate things, the whole point of joints to flow, to extend textures
shoulder rolls into bicep rolls into elbow rolls into tricep rolls into wrist rolls into hand to make for one solid arm, rather than 6 individual textures.

keep working at it.

I think it looks awesome! I feel like you could make the other shoulder textured but have the design get smaller just to show asymmetry

Thanks everyone, I'll take it into consideration. I'll probably start changing the body textures