I really regret going to grad school for physics, I gave up a lot of earning potential, time to develop new skills and I've forgotten a lot of my CS background. Most methods in my area have already been developed and the pressure to publish (pushy advisor, several projects not producing the intended results, and proposal writing) has always been hampering away at my free time to think. I really dislike this system. At the same time, I'm sure exists in industry too (never had a real job). I'm not going lie, I feel a bit trapped, but I'm still a fairly positive person.
In the sciences, grad school is sold as a necessity but I'm starting to think this is a way of fueling the ivory tower.
I realize that this is a bit incoherent/ranty, but whatever. :)