There is a lot of uncertainty. Depending on where you are working, some floors require more of you, others require potentially less, while those floors that require more of you are run in a chaotic fashion. It's normal to work hard, expect that anywhere, but requirements provided by certain levels of management can be a bit unrealistic.
Some floors are also very politically motivated, meaning if you aren't buddy buddy with the management, you probably don't stand much a chance of being strongly recognized and moving along.
Some floors focus on employee development, the process, while other floors only care about results.
Some leadership