Note important exception: if I am learning a new technique, I'll give it a fair shot before assuming I just don't like it. I should expect to be bad at it and find it frustrating for a while at first.
This resolution came about because I started an Xmas present for one of my brother-in-laws, and even though the pattern was pretty -- oops, I mean studly and masculine -- I wasn't enjoying the knitting. It took me eight long and tedious rows to realize this. In part the problem was the Debbie Bliss Rialto yarn, a 100% merino, which was just 'eh' -- not bad, but not actively nice either. Soft, which is why I got it, and in a nice shade of grey, but annoyingly splitty. A bigger problem was that the pattern was DK weight on size 4 needles, and I just can't take on something that slow right now -- it was making me anxious about finishing my Xmas knitting. So I gave up and frogged it. I might hold the yarn double and try to make a bulky pattern out of it, but I'm as likely to give it away to another knitter who might like it better. Yarn preferences are very personal.
I picked up another project, using Misti Alpaca Chunky, a yarn I've used before and I vaguely remembered liking. And, oh, love. So happy doing seed stitch with this yarn; it feels glorious in my hands, and goes satisfyingly fast on size 10 needles. This is exactly the kind of knitting I need right now -- mindless and quick and luxurious. Yum.
I may be in a mood for fiddly and detailed another day. Suit the task to the mood, yes? It'd be nice if we could always do that with our work. But at least I can do it with knitting / crochet.