Thanks very much. I have to say, being so new to this and being such an amateur it's sort of difficult to know where to start…
The thing is, most of my entertainment interests centre on things that aren't so much cult as just, well, obscure (for example, Rebecca's Daughters is one of my favourite films ever – a film no one's ever heard of that was only ever available from Germany which is now out of production). Or, they're things that were popular in their day but now no one mentions, like Secret Army or Sapphire & Steel.
This is compounded by the fact that I've been home-schooled for most of my life, and don't really know what's mainstream and what isn't. Like when I first started sixth-form college to get my GCSEs, I was absolutely stunned to learn that no one else my age had ever seen Upstairs, Downstairs (it's like, WTF?!). Similarly, I was surprised to see a Withnail & I thread on here (a film I've seen over and over; I adore it), as I didn't realise that that was still considered cult.
So you see, I'm rather out of my depth here. But my knowledge is slowly increasing, I've read a number of threads on here with interest, and as I become more familiar with everything, I'd very much like to contribute constructively!
Thanks again for your help.