I was a student of jujitsu (not Brazilian or Japanese, more like a combination), but I stopped training around when I entered college. Basically, if you want to grapple in a fight, you can make it happen. It is pretty easy to get someone on the ground or in a clinch and then you go to work. Someone who is not trained to grapple will basically be at your mercy. And I would very much recommend learning a stand-up fighting style in addition to a grappling style. While I was actively pursuing martial arts, I always felt I could have benefitted immensly from doing so.