Shark tales was maybe a bad movie, but Dreamworks had a lot of goods movies too.
I prefer even Dreamworks good movies to Disney piwar (seriously, why did the leave all good moment like lion king to do fast and strange movies in 3D? Where's the good old deserved animation, that was worked not ONLY with computer?
Dreamworks have done some movies in 2D. And, when they was under another name, they did the great Balto.
So, dreamworks may be not perfect, but personally I still prefer it than Pixar.
*reads an article on the subject* Well Amblimation made Balto, which Speilberg produced, the same man who co-founded Dreamworks. But I wouldn't call that a Dreamworks movie any more than I'd call American Tail a Disney movie just because Bluth (a former Disney animator) made it.