As we all know, Dragon Ball is known for its inconsistent animation, as you can go from an absolutely gorgeous episode to a terrible looking one. There are several different studios that animate the show, all having their own style, and it seems to be the supervisor who really makes or breaks how the episode end up looking like. Here are the really notable studios and animation supervisors:
Maeda Minoru
This was the chief animator of Dragon Ball and the first 199 episodes of Dragon Ball Z. His animation is absolutely fantastic, and he seems to be the originator of the art style that Toriyama would use throughout the Z portion of the series. Here are examples of his stuff:
Shindou Pro
These guys are also known as the "evil eye type." Oddly enough, however, these exact same guys would be responsible for some of the best looking episodes of the Android and Buu sagas, thanks to a simple change in animation supervisors:
Under Shindou Mitsuo
Shindou Mitsuo just seemed to really like the pointy eyes and whatnot. He would take the key animators frames and adjust them to his liking:
However, Shindou Mitsuo stepped down after episode 116 and in his place as supervisor was Yamamuro Tadayoshi, one of the key animators from that studio. Under his wing, we got shit that looked like this:
Seigasha
Seigasha was another prominent studio. Throughout it's run, it had three different supervisors: Takeuchi Tomeyoshi, Shimanuki Masahiro, and Kuda Kazuya. They all had similar styles. It was basically similar to Toriyama, but with it's on twist. They had a really distinct way of drawing eyes, ears, and mouths:
Studio Cockpit
Ah, one of my favorites. These guys came around in the Cell Games saga, and they're fantastic. It's very different from Akira Toriyama, but the drawings and choreography are so great that it doesn't particularly matter:
Those aren't all of the studios, but those are all of the ones I felt like covering. We of course have some of the shitty studios too, like Studio Live and Last House, but we've discussed to death how awful those episodes are (although during the Namek saga, Last House's stuff was actually decent, but then thanks to under-staffing and Uchiyama doing more stuff, it became an abomination)
