The big challenge is that the work at the Big 4 gets more and more interesting as you get further up the food chain. As a manager, senior manager, or director, you are much more likely to get involved in projects that genuinely stretch and challenge you.Because the Big 4 all work on a pyramid model, they wll always have armies of the junior guys billing high rates to do pretty uninteresting work. But I agree with the posters above. Keep at it and you will learn loads, and when you eventually move up the chain, you will find that the work really is rewarding, both financially and intellectually.I have spent a good part of my career in Big 4 consultancies, and I don't regret a minute of it.