The Vietnamese are making some damn good baguettes. All different kinds too.
Co-worker of mine is Vietnamese and she'll occasionally bring in a selection of Banh mi Pate sandwiches. Damn I do love inhaling those things.
As for LA, the one thing we're known for Sandwich-wise is creating the French Dip Sandwich. We got two places in town that claimed to have invented the thing: Cole's Buffet and Phillipe's. I prefer the Phillipe's sandwiches and the crazy line and sawdust and pots o firey mustard.
It looks so humble there, but damn is it good. You can get a beef dip, turkey dip or a lamb dip and you can get a couple different cheese varieties on board as well.