Years ago, I started an afghan as a present for my parents. I wasn't a very good crocheter at the time, and ended up abandoning the project (it was full of mistakes). My mom has never let me forget that she'd still really like to have that.... For Christmas this year, I'd like to make an afghan to surprise them. (OK, they might not get it 'til March or April, but that's beside the point.)

I'm going to do an aran (or fisherman's) pattern--using a handful of patterns to kind of develop my own as I go. Most of the crochet I've done has been with thread. I'd like some yarn recommendations. (Please!) I think I need to use worsted weight, but there's a lot of worsted weight yarn out there. What's your favorite?