Hmm. I came from NYC to London - so I don't know that my fashion changed THAT much, although I feel like people wear things more fitted here, so that's what I ended up doing. I bought a fair amount over with me, so I mostly wear my older wardrobe which is a lot of dresses from various places. Some jeans, but nothing of the high end.
But...and I must say this, even if it turns out to start a fashion war in this thread. I am not against leggings or jeggings - IF WORN PROPERLY. I agree that leggings are not pants, and should never be worn with a short t-shirt. However - with a longer sweater dress? I think entirely appropriate. And the jeggings - now, the jeggings I came across when trying to buy skinny jeans - Uniqlo had them. And they really are just stretchy denim jeans, not leggings made to look like jeans. Love them. Love the whole longer tunic look and with these, it just makes a very comfortable outfit. That said, as with the leggings, I really think they should be worn with longer shirts/tunics, etc.
I come in peace, I'm just saying leggings/jeggings aren't all bad.