I like it AWESOME ART WORK as usual... BUT your previous SSJ5 was much more original ... Maybe in the future you could use that design for something else Id hate to see such an awesome design go to waste lol
The hair was more unique looking with ASSJ4 and honestly looked a lot better. Now this looks like Base Goku had SSJ3 hair sewed onto his base hair style. Also the whole gold hair thing again just makes SSJ4 feel out of place since that one gave black hair...or brown if you're Vegeta.
The hair and anatomy are a step up from your usual work, definitely improving. The design looks good, though I'll hold further judgement till I see it colored. Im still rather on the fence with the gold/black scheme.