Straight hair. Easier, in every way, to work with. IF I let my hair grow a little longer, the front part has a beautiful wave, which I love, BUT there's a price to pay for that! My hair gets excessively oily & sweaty, so it needs to be washed twice daily. Can't be bothered, so keep it short. Lots easier to manage. Whilst working, used to let it grow over Winter months'. Wave did look pretty!
My hair is straight, but I wouldn't mind it with a little wave in it. I've noticed most of the female news-readers & the weather girls have had a 'wave' put into their hair, before they come on onto tv each day!