i'm an AM workout guy, usually 9:30-11:00 range... I work 2nd shift so it's pretty much my only option unless I would work out at 11pm after work, but that doesn't seem conducive to maximum effort...
i would like to see some studies done on workout times and results...
disadvatnage of AM workouts: I'm not a morning person, i love to sleep and stay in bed... getting up early enough to get a good amount of food into your system before hitting the gym