I didn't reply yesterday because, hey-I'm a gal. I don't know what's fashionable acceptable for guys and jeans.
Face it, jeans are hot and sweaty when the weather is hot and humid no matter what they are made from. Some women tend to go for the ones that have a little spandex in them so it has just a tad bit of give on those days when we are having some bloating (TMI?). All cotton is good too. You just need to go to the store and try a bunch on and see what feels and looks good to you. Take an unbiased/honest person with you because the sales people will tell you it looks great on you when you look like a stuffed cabbage in reality.
I don't think they shrink much anymore. I think they are mostly pre-shunk before you buy them. After you've worn them a few times between washings, they do stetch some. Then when they are washed and dried they will shrink back to the original size.
Good luck
Sarah