If you're the type of person that can only "work hard" due to being driven by needing the project to be completed and as best as it could possibly be, then maybe working for MegaCorp is not the best idea. Seems to be you'd be much better suited for a start-up (hopefully with prospects of major funding).

If you're the type that doesn't want to work very hard and just there for a paycheck, then you are probably more suited for working at MegaCorp.

Getting these out of wack makes for unhappy working conditions.