I took English Language and Literature, Maths, Triple Science, RE, Spanish, History, Music and Latin in June 2020.
My favourites were Music and Spanish, though I know a lot of people who didn't enjoy Music so much or found it really hard - I'd taken Grade 5 theory beforehand which was definitely really helpful. Spanish was great because I love language and I found the class' dynamic to be a lot better than some of my other subjects, but again if you've not taken it before starting the GCSE it can be really difficult, but 100% worth it!
If you can choose whether or not to take Triple Science at your school, I would recommend it if you want to go into Science or have a genuine interest; personally neither applied to me, and so it felt like a lot of work without much of an outcome, but I didn't really have a choice. That being said, it can't hurt you too much! And I knew a lot of people who loved taking all three subjects.
For RE, I had to take it as I went to a faith school, and there was a lot of focus on specifically Catholicism because of this. I didn't love this aspect, but there was also a lot of discussion of philosophy and ethics which were really fun.
History was by far my least favourite subject (closely followed by Biology); I just wasn't interested in what we studied. If we'd focused more on politics I think I would have actually enjoyed it. So if you're considering History, I'd recommend looking at the choices your school has made for the syllabus as there's tons of different routes and making sure that they're all areas which you enjoy. History also has a very heavy workload.
If your school offers Latin, I'd recommend it if you're interested in History or languages - it's great for extra language aquisition - and I personally didn't find it to be too much work. Learning the poems was a bit of a chore, but otherwise it was all really engaging. The vocab's quite easy to pick up as so much of Modern English is based in Latin, and it definitely increased my English vocabulary too.
I've written quite a lot here - I hope some of it's helpful! Ultimately, I'd recommend going for what you enjoy over what you think you should do; if I could have taken Combined Science and Drama instead of History I think I would have enjoyed my GCSEs a whole lot more.
Good luck!