I began learning to knit six years ago, changing to crochet shortly after. Knitting and Crochet, although similar are two different techniques. With knitting you have two needles, whereas with traditional crochet you have one hook. Also knitting can be machine produced, if you have a crocheted item it will have been hand-made.
Nowadays I rarely knit, prefering to adapt or even re-write patterns to crochet. I take on a lot of commissions over the winter months as the weather gets colder, often attending craft markets to sell all my delights. I have also written my own patterns, which can also be purchased in the shop.