My director says, and I agree, that there two types of chemical engineers: The "clean" and the "dirty".
"Clean" engineers consist of managers, directors, supervisors, etc. They spend most of their time allocating work to the "dirty" engineers. You don't need to know a lot be one of these (If you like money, then that's enough)
"Dirty" engineers, like myself, spend about 60% of their in the office working on design or optimisation or whatever. The 40% is spent on site, commissioning the plant and getting it to run well which usually involves 30 - 40hr days with no sleep or food trudging whatever collosal mess you've just made (sludge blow - out, chemical spill, etc). The money is still good, but you have to be willing to push your body hard, and it is essential to have a good knowledge of mathematics and chemistry (although chemistry can be avoided if you're lucky - I'm not so lucky).
In short, chem eng is loads of fun. The satisfaction of seeing a working plant, which serves as a livelihood for the people who work there amongst other things, and best of all legacy of you which will (hopefully) stand for decades, is beyond description.
Good luck with whatever you choose.