I use my US license and only have occasional problems. I look like I'm about 15 so it's pretty rare when I don't get asked for ID! I am considering getting a provisional just so people don't spend forever trying to find my birth date.
Semi-related rant:
There's a woman at our local Co-Op who clearly has it out for me. She asks for my ID every time I'm in there and it always results in a massive fuss - it's like she can't realise I'm not getting any younger. The first time I handed my US license and she asked if I had anything British.
Obviously not - if I did, I would have given you that... So she called a manager over who said my ID was fine, despite the teller pushing for more scrutiny. A few weeks later I go in with BF, who looks a lot older than I do, and he bought some beer. She not only asked for his ID but asked for mine as well, claiming that they have to see everyone in a group's ID, regardless of who is purchasing the alcohol. So what about those toddlers who go shopping with their parents and probably don't have any ID? Are their parents not allowed a bottle of wine until their children are the right age?
