People who hate either one will hate a product made by both. I have two friends who despise BioWare and Bethesda games. They're good guys, they're just not too big on expansive or free-form plots, or deep characterization you have to investigate on extra time to enjoy.
Personally, I like BioWare more than Bethesda, although Fallout 3 is definitely my most played game ever.
Personally, I like BioWare more than Bethesda, although Fallout 3 is definitely my most played game ever.