No, USA blows.  I highly dislike the political system, the federal reserve, endless wars, plenty of stupid laws, infrastructure that is falling apart, using tax payer money to build a road then sell it to a foreign company, plenty of idiots, evangelical christians, the way the environment is treated, etc (I can keep listing shit if you want).  

I'd rather live in Canada.

I would recommend Toronto Ontario. The winters here are far milder than the west (Alberta where I used to live had dreadful winters), and the summers are sunny and warm (some weeks can be too warm). You have Lake Ontario (massive lake) where you can go for a swim if you like, and you can drive to the mountains if you enjoy skiing in the winter, you have a wonderful night life, a VERY eclectic city, a great indie music scene, a great art scene, great cuisine, you are a couples hours away from the US. It is a very happening city, you get hollywood movie premieres here, every band on the planet passes through this city at some point or another, it close enough to the UK so you can visit friendsd and family with ease (can get a direct flight - Vancouver is about 5 or 6 hours from Toronto, yes Canada is massive, so that is another 5 to 6 hours to get to the UK, plus another couple hours if you have a connection within canada). You will probably be coming here for university, and Toronto has several world reknowned universities. And if you love it so much that you decide to live here then it has a bussling job market as well. And there is probably less racism/hate here than the US and UK.

Someone was saying that living in the south or bible belt is a bad idea, it depends where you live though. I lived in Oklahoma for about 4 years and met some of the best people there. It is not as close-minded as some think (those people are ones who probably never lived there and are making generalizations based on what they see on TV or what they hear). I had a great time there, I left not because of the people, but the place itself just doesn't have that much to offer.

Basically, Toronto is the shiz! Do your research though, don't just rely on what we have to say.

One stereotype that looks to be true when I visited the US was that they all seem to drive huge cars - I swear it was almost (if not more than) half the cars that I saw there were trucks, jeeps, hummers and land rovers etc.

This is truth.

Should come to shit Texas and you will see about 2/3 of the vehicles SUVs and trucks.  There are some more smaller cars due to higher gas prices but you know the suburb mom must drive a fucking Suburban to transport her 1 - 2 kids around (or daddy needs an Excursion to drive by himself).  I drive a 05 civic ex and it is hard to make turns sometimes at intersections when you have a tank trying to turn (left at the intersection from oncoming traffic) and blocking your view of oncoming traffic.

That is true. All those truck commercials are geared for the blue-collar hard-working man! YOU GET TO PUT YOUR EQUIPMENT, YOUR PRODUCE, YOUR GRAVEL, YOUR WHATEVER IN THE TRUCK-BED TO HAUL AROUND!!!! but in reality, most of these trucks are just empty in the back - never used for anything. most americans buy these trucks because they think its cool to drive a truck. that it is their equivalent to riding a horse and makes them feel that much more like a cowboy. it is like an identity for them, it is AMERICAN to drive a truck. man, people can be silly...

The Natives described the area as a very smoggy area before industrialization ever moved into America. I don't think it's got much to do with pollution.

OREGON!

Unfortunately, you can't just "move to America", it is far from that easy. There are only three real ways to do it legally, if you are a Brit:

1) Family. Marry somebody with the right to be in the US, or have family members that are citizens.

2) Get a job. This seems easy, right? Wrong. Employers looking into hire workers from outside the US need to spend a lot of money to get you in, up to $10,000 per employee. Employers need to prove that you will be better at the job then an American, so you need to have a key skill, or years of experience. If you lose your job, btw, you have two weeks to find a new one, before you're breaking the rules of your visa.

3) Entrepreneur. You can buy your way to American residence. You just need a lot of money. Enough money, in fact, to start your own business and be able to support it and yourself throughout the "start up period". There are no fixed numbers for this, you just need to convince the American Government that whatever you have is enough to start and support a business for an amount of time, dependant on how long they think it will take for the business to become self-reliant. According the the Internet, they allow you in if you have $50,000 and a plan for a small business out of your home, or something. Try to add a shop or something like that, and it's going to balloon to include all of that overhead.

And that's basically it, for a Briton. Becoming an American resident takes time and money, no matter which path you take. I know that you're quite young, which is beneficial. I was young when I decided I wanted to move to the USA, so I was able to direct my education to help me get in via (2).

EDIT: In response to your question as to whether you should. That's down to you. I wish to move to America because I love the culture, the politics, the institutions, and the optimism. Those things may not appeal to you. I'm personally gunning for a state like Arizona... lots of hot weather, a beautiful desert climate, and a relatively short distance from all the great cities of the South-West. The South-West, in general, is my favourite region as it embodies a more libertarian nature compared to other regions (Pacific = liberal, North East = moderate, Mid-West = conservative, South = neocon).