I think one of the reasons I got so tired of making hats for charity was because I was using the same pattern. Every time. Four times. In a row.
Sometimes you just need a super bulky yarn and a size N crochet hook. I've had the Chunky Cap (Rav link) by Kathy North queued for almost two years, and I think it's about time I used up some of my big fluffy yarn. I could definitely knock out some Patons Divine and Lion Brand Homespun. Yeah, fat yarn and a big crochet hook.
I could go for that.