English Lit, to me, is a lot more enjoyable at A Level than it is at GCSE, however it's a lot harder. Genuinely the hardest exams I have ever done were my AS and A2 Lit exams (the A2 one I actually did this morning, ha.) It's very easy to do in class, especially if you have a good teacher, as the texts are really enjoyable and the analysis and debate is a lot more mature. However, in an exam it's a lot harder because it comes down to how well you can answer the question and you have to make sure you don't go off topic. It's a very hard subject, and it's totally different to GCSE.
At GCSE I got an A in English Literature, and in my AS year I also got an A, but I was very surprised about it. I'm hoping to retain it this year and feel strangely positive after the exam this morning however it's very hard to predict how well you have done - I thought I had got a D in the AS exam last year, when actually it was a high A. Whereas in my other subjects (Politics, Law and Sociology) I usually come out of an exam knowing how well I have done, and have been right in my predictions. However, one positive is that the grade boundaries and UMS conversation rates are very low for English Lit. Last year in the AS exam you could have got 61/80 and it would have been 120/120 UMS, full marks. While that is a very good thing, it does act as a reminder of how hard the subject is.
Each college will do different texts, it is down to them what they choose, but each does do the same amount. The texts won't change year by year on the exam, but they can change in a college if they choose to do a different text on the exam as there are a number of choices. However, last year I do believe Dracula was taken off the exam, and was actually taught by a college not knowing it had been taken off, leading to some very confused students come exam day!
You do 2 pieces of coursework for each year, and an exam per year. For my coursework in AS, we did 'Much Ado About Nothing' where we had to write a monologue as one of the characters. The we did 'The History Boys', which was just an academic essay. For our exam we did 'The Great Gatsby', 'The Kite Runner', and poetry by Browning and Rossetti.
For A2, our first piece of coursework was a comparative piece on the play 'A Doll's House' and a text of our choice, however we were given a list by our teacher on what we should use; I chose 'The Yellow Wallpaper.' Then our next coursework we did another text of our choice and had to give either a Feminist or Marxist reading, or debate whether it should be part of the literary canon. I did a Marxist reading of Tony Harrison's poem 'V.' And for the exam you will either do gothic or pastoral literature, we did gothic and our texts were 'The Bloody Chamber', 'Macbeth', and 'The Pardoner's Prologue and Tale.' The A2 exam is also closed-book, meaning you don't get the texts in the hall with you, you have to pretty much memorise all your quotes off by heart. It's very tough.
I think you would enjoy Literature, and I certainly recommend it. However, as I said, it's very different to GCSE. For A Level, you actually have to know how to write succinctly and fluently, expression is very important and you must unpick a question correctly, it's miles away from GCSE where you just had to analyse a few different aspects of a text and that got you an A. If you're good at GCSE, it doesn't mean you'll be good at the A Level, however I do recommend it because it is a beneficial subject to have, and will give you a break from your maths and science and allow you to be a bit more creative. And if you don't do well, just drop it at the end of your AS year.