Biology and chemistry...only coz a hot teacher used to come in at least three times each lesson i found it hard to concentrate whenever he'd come in...it's a wonder how i passed the subjects!
My science teacher was a 60 year old man with a slight body odour problem.
EDIT: And my favourite subject was maths because it's awesome .
Did standard grades rather than GCSEs, but mine was Maths. We finished the main part of the course early so we got to do some more fun/challenging stuff. The coursework for physics was dull but easy so I didn't have to work that hard... Just talked about more interesting stuff with the teacher. If I had to spend more than the minimum possible time studying 'The Use of Electricity' I would probably have killed myself.
None of the GCSE/standard grade courses are that interesting to be perfectly honest.
Apart from that though, I would say maths, astronomy, science (all three) and English lit/lang because I either find it interesting or have good teachers
French was my favourite lesson at GCSE. If I was better at it, I would have taken it on to A level. Electronics was a fun lesson as well because the class was just full of us guys so there was a lot of 'banter' (hate that word ahah)
Art is not chilled at all in my school haha, though I do have an absolutely amazing teacher! Recently began developing a love for Maths too, of all things?
I hate Chemistry & Eng Lit with a passion though ==