I've moved a couple times since I started riding a few years ago, and the first two barns I rode at were jumper barns. While jumping was fun, I felt like both of those barns put jumping before elements of a proper seat and control of the horse, so the next time I moved I looked for a dressage barn, and I think it was the right choice for me.
I've stuck with dressage because I enjoy the close partnership I feel with my horse when we're learning new things. Perhaps it was because I was still very much a beginner, but I didn't get that feeling when I was jumping.
I now lease a horse that isn't allowed to be jumped, but if I don't end up buying him, I'd love to try some eventing with my next horse!