The best decision I ever made was moving from a big company to a very small one.

I used to work for a large international consulting firm in the model development team. Everything moved so slowly, there were huge amounts of pointless meetings and other time-sinks, we were surrounded by people who were being paid a lot of money but added little or no value, and the general atmosphere of the company was quite depressing. We spent more time having to make PowerPoint presentations for senior management trying to explain why you can't just hire 100 devs and have a product 100 times faster than we actually did developing a product.

I took a bit of a risk and moved to become the fourth person (and second developer) at a niche software producer to take over product innovation and lead product development. Immediately I felt so much happier and realised how much the previous company had worn me down. Everyone works hard and efficiently because your individual output is so much more important to the success of the company and the work you put in comes back to you financially without being syphoned by layers of valueless management levels or time-wasters.

Having responsibility, seeing the impact of your own work and being rewarded accordingly is so important for your sense of well-being. I urge you all to try it if you're stuck in a big company that's wearing you down. And if you're considering moving from a small company to a big one: don't.