Possesion of mixer taps will get you sent to the Tower. I'm expecting arrest at any minute.
Back to the topic -- a lot depends on the level of public transportation you have in your area, plus your own personal tolerance of having to use it.
I'm in London where there is plentiful transportation in the forms of buses, tube, trains and taxis, but I started to find that, after having been spoiled for years by driving my own car around the US city where I lived, that I now feel it to be hardship to struggle around on buses and tubes with heavy groceries or whatnot. When I need to buy a household item that can't be delivered, I have to worry how I'm going to get it home -- things like that. My joints are turning bad and the walking that usually comes hand in hand with getting to bus stops or tube stations is doing me in.
For someone else, none of these things would bother them, but for me personally I have a hard time now with public transportation, and despite all the expense of owning a car, I'm trying to aim for that goal once more. I want to be able to once more get around comfortably under my own steam and on my own schedule.
So it may come down to how you yourself feel about your local transportation system or even how your body is coping (as mine is falling apart, lol, yours may not be!)
About the UK driving test -- as others say, it is DEFINITELY good to get onto that RIGHT AWAY rather than wait until your 12 months of legally driving on your US licence is up. When it's up, you can't drive unaccompanied while in "learner" status, but before it's up you can -- which is great because you can practice alone in addition to lessons if you can borrow a car.