Truth be told, Aaron Marino of alpha m. doesn't know how the attached hood has become so popular. If you are investing in a jacket, make sure the hood is removable. Or buy a jacket that doesn't have a hood and wear a hoodie with the jacket.
In about two years, this look may not be in style. So if you go with a solid and simple jacket and combine it with a hoodie underneath, you will get the same super sexy look in a smarter way. Bottom line, make sure the hood is removable and you have the hood option.