You know, the OVA they made in the 90s was considerably good from an animation standpoint, specifically the older half based on the later parts of Stardust Crusaders.
The dark colors and rough-edges style actually compliments JoJo well. Then again, that was back when anime was still for the most part traditionally animated. I love the new anime to bits and pieces and think it's damn faithful to the manga but at the same time it's got just the slightest artificiality to it.
Now, I could make minor complaints about design and color choices but for all its faults, I think the Part 3 OVA was at least nice to look at.