I started dancing with ballet when I was 5. When I was 9 or 10 I moved on to jazz dancing and gymnastics. At around 13 I started doing hip-hop, and at 15 I also took up tap. That's also about the time I started doing musicals, so I danced in a lot of chorus numbers. At 18 I added modern dance to the mix.
I didn't start ballroom and partner dancing until I was 19, but because of my dance background I picked it up rather quickly. I've been ballroom dancing for about 6 years now. I still do ballet and jazz on occassion, but ballroom is currently my focus.