I absolutely wouldn't. I have had my hair straightened about 4, maybe 5 times in my whole life and my DH told me that I look weird that way! I pretty much never feel like having straight hair, even on my worst hair days.
2b/3a, primarily use Jessicurl and DevaCurl products, Curls Hair Tea conditioner and various gels. I'm modified CG-ish since 5/04.