Yeah, I definitely prefer knitting to crocheting! I technically learned to crochet when I was really young, probably ten years ago or so. And I would do a little something off and on, because I learned from my grandmother. So I knew how to do it, but never did much with it.
I learned knitting from this amazing website, and while I prefer it to crocheting (especially for results), my new love of fiber crafts has gotten me to do a little more crocheting. The projects in S'nB Happy Hooker are really cool, so I've made some stuff from there. And I also prefer crocheting for afghans and sometimes bags. It's also really fast and makes cool lace and edgings, plus I'm really interested in learning filet crochet.
Socks are my absolute favorite, and I love the process of knitting as well as the results for all kinds of garments like socks and sweaters, scarves, hats, and the effects of awesome colorwork. But I like crochet for granny squares (I CAN'T HELP LOVING GRANNY SQUARES), super quick hats, afghans of all types, and bags.
So I guess to answer the question: Learning to knit has actually increased my amount of crocheting because I am doing so much more work in general. But the amount of crocheting I do pales in comparison to the amount of knitting!