Hi, I'm a student and a day normally sees me shuttling between different places in school. I use a 15.4" MBP (MB user previously) in a Timbuk2 (medium-sized) sling bag. There'll be a time after mid-day when I realize the weight of the bag is killing me. My shoulders are aching and sometimes I get this burning sensation. I tried going to school a couple of days without my notebook (impossible to do again) and I realized how much lighter my bag was and I could honestly carry it around the whole day without any issues. However, when I read these threads, it seems that most people seem to have no issue with the weight of the MBs and MBPs. Am I an anomaly? The MBA looks very appealing to me simply because of its weight. It is the lightest notebook. I was actually thinking of downgrading my SR MBP to a 12" PowerBook when I realized that the PB is only slightly lighter. God, am I only the one that feels the Apple's current line of notebooks (except the MBA) are heavy to carry around the entire day? Please tell me I'm not alone. Thanks.