If I had to choose a favorite crochet technique, I couldn't do it. No way. But if you forced me to try to list several favorite crochet techniques, for sure, tapestry crochet would be on the list.
If you've been following this blog for awhile now, you're no doubt aware of some of the free tapestry crochet patterns we've posted. You can see tiny thumbnails of a few of them here in this blog post. And if you're new to this blog, well, I hope you'll spare a few moments to look through our patterns; we've posted bunches of interesting designs, and the collection is always growing.
I've been working on compiling a list of tapestry crochet resources linking you up to information about where to find tapestry crochet books, tapestry crochet instructions, free tapestry crochet patterns, tapestry crochet blogs, and more. I hope this list will be helpful to you, and that you will enjoy perusing all the links included on the page.