Ok. at the risk of sounding like a total yarn snob, I have to say I generally wouldn't touch the stuff. I am a major wool fanatic and love the way it keeps me so warm and comfy. There is no doubt that I'm majorly lucky to be able to afford the wool, but I'd rather have less wool than more yarn, generally.
Having said that, I in NO WAY transfer that snobbishness to other knitters. If you want to knit with part wool, part acrylic, all acrylic, heck, all YAK hair, go for it. I just love to see people enjoy knitting.
I've only met one acrylic I like, and it's a lovely, soft yarn at Michael's. Maybe I should buy a couple of skeins and see if I like knitting with it before I dismiss wool so easily. I just hate Red Heart stuff - not my taste.
So there ya go.