cramping your style

shoulder carriers:
fine as long as you keep your side neck muscles flexible (the side u carry your bag on), balance yourself as much as possible by weighting the other side of you (any additional accumulations, perhaps a big H bag with a new birkin in it??!!!)
hand/elbow crook carriers:
same
hint: it seems shoulder carriers have a tendency to raise up the shoulder a bit, which can lead to spasms.
I make it a practice to consciously press my shoulder down. helps me...great practice for WHEN i acquire my first Birkin. !
angie
 
for me it was shoulder bags....but probably it was aggravated by me also carrying babies on my right side and anything and everything else - so I felt my shoulder was slumping...I tend to carry handhelds on the crook of my elbow mostly...
 
If I carry a handheld, that's the day I decide to do a ton of shopping (without the car of course) and end up hauling multiple carrier bags as well as my purse. Such a pity that fanny packs are so awful.

But handheld bags are still the chic-est, I think.