Yup, the vast majority of people, either from over emphasising 'mirror' muscles when they train or just everday motions tend to be hunches forwards at the spine with their shoulders rolled inwards. If you're spending all day hunched over a desk/computer/counter/steering wheel then you adapt to that posute (if our eyes were on the backs of our heads then we'd be hunched backwards!)

Most people I see could do with developing the poserior chain, particularly their rhomboids (rowing exercises) Posterior Deltoids/Rotator Cuff (Reverse Flys, Y Raises, External Rotation) to correctly align the upper spine and shoulders.

Loosening the abdominals and anterior deltoids/pectorals can help as these muscles are typically tight and teaching the glutes to fire correctly and function with good range of motion (Back/hip Bridges, Lunges and Squatting with CORRECT form, focus on raising and lowering your backside, not on flexing your knees and don't let your knees pass your toes at any point.) can prevent the quads from becoming over worked and hamstring/lower back becoming over active and doing the glute's job for it.

A Piriformis stretch wouldn't go amis either!

Depending on how serious you are, a course of sports massages might help, if not I would at least invest in a foam roller for some deep tissue release.