Pros
Food, comfort, and happy people. BioWare is a comfortable place to work and a happy environment. You must find a healthy place in the corporate structure where creativity is allowed to thrive and corporate needs are sheltered by strong leads. There are some really creative people at BioWare, and it is an absolutely amazing environment to wet one's feet or season one's skills.
Cons
The large corporate mogul of EA opens doors but closes independent thought. Only on the micro-level may creativity thrive, for revolutionary ideas that can be iterated on rapidly in a small company setting turn into months-long trudge of certification, documentation, and stagnation. Long "assembly-line" like production pipelines turn great ideas into watered-down results, quashing the desire for creativity into production, as the outcome of both becomes identical.