I'm finally breaking down and replying on this one (and one other, same subject).
I guess I am in the minority but I prefer LME. As I posted here:
...my preference may be shaped by factors that are environmental but the nuisance of handling DME makes it an overwhelming second best for me.
I might also be lucky to have a LHBS that does pretty good volume business (and is run by a guy who really cares about the art of brewing), because I've never felt like I got a can that was stale or old.
I will also say this - I was drawn to Briess because it is domestically grown, so in theory it is fresher and also I prefer supporting domestic producers, all things being equal. But I don't care for their products particularly, either dry or liquid. They just don't seem to give me as full a taste as either Munton's or Cooper's.
It's hard to describe, but to make a musical analogy, the brews I've made from Briess seem like a band without a bass player. There is something that's missing but it's not obvious what it is. I asked my LHBS guy about this and he speculated that it could be that since Briess primarily produces for big commercial brewers, they try to make their products more for the needs of that market.
There. I feel better.