I'm a very goal oriented person and tend to exercise regularly only if I have something specific to work towards like a mountain peak or a race. I got into Pilates because I was looking for a background exercise to "come home to" when I was between physical projects. I have been extremely happy with the results.
It's not just about getting strong (although I want that too). For me, it's really about training my body to respond accurately and correctly to my intent. Pilates trains your entire nervous system, from your brain to your little toes, to work together to maximum effectiveness. Whether you're completely out of shape or just looking to improve your developed sports performance, Pilates will give you a more effective (and better looking) body.