I think people also need to look past the glamour of MBB when considering a career in the field. Often times, you're little more then a bean counter who comes into an organisation to downsize and outsource. I mean, every now and then you will do work for companies who want to conduct process improvements which are fun. But often, companies bring in hatchet men to do all the dirty work which they arent willing to do and that is where a lot of these firms come in.
I dont mean to be discouraging, because as I mentioned it can be fun and stimulating, but there is another side to it.